diff --git a/.gitignore b/.gitignore
index 87933ac..71cc3c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,6 +33,7 @@ CVS
 /focus
 /hifi
 /hrpt
+/hrpt2
 /morpheus
 /poldi
 /ppms
@@ -40,6 +41,7 @@ CVS
 /seaman
 /tasp
 /zebra
+/zebra2
 /logger_tar
 cheat_chart
 tcl/stuff_before_2022
diff --git a/tcl/17tf.config b/tcl/17tf.config
index 195505e..8dde30d 100644
--- a/tcl/17tf.config
+++ b/tcl/17tf.config
@@ -28,7 +28,7 @@ GraphAdd 17tf.nlevel      % N2_lev black
 #makeCCU4 blank nv
 #GraphAdd nv.flow      mbar nv_flow red
 
-makenv ln2fill -driver ccu4ext n2 "17tf nlevel"
+makenv ln2fill -driver ccu4ext n2 /17tf/nlevel
 
 
 #make17tfNv
diff --git a/tcl/dil5.stick b/tcl/dil5.stick
index 2200687..3df72ae 100644
--- a/tcl/dil5.stick
+++ b/tcl/dil5.stick
@@ -1,54 +1,13 @@
-stickDesc = 100 mm dilution
+deviceDesc = DIL5 Frappy history recorder
 
-set box linse-dil5
+set ::secop_version 4
 
-proc triton {kind obj name db col {htrdb ""}} {
-  upvar box box
-  makenv $obj -driver itc$kind -port ${box}:33576 -controller _tritondil $db $htrdb
-  switch $kind {
-    temp {
-      GraphAdd $obj K_3 T_$name
-      # GraphAdd $obj.raw Ohm_3 R_$name
-    }
-    press {
-      GraphAdd $obj mbar_2 p_$name
-    }
-  }
+set ins [result instrument]
+if {[string match "prep*" $ins]} {
+  set nr [string range $ins end end]
+  makenv frappy_stick -driver secop -port localhost:1521$nr
+} elseif {[lindex [split [info hostname] .] 0] ne $ins} {
+  error "runs on instruments or prep0-9 only"
+} else {
+  makenv frappy_stick -driver secop -port localhost:15201
 }
-
-proc itcchan {obj name dbt dbh col setcol} {
-  upvar box box
-  makenv $obj -driver itctemp -port ${box}:3000 -controller _itcdil ${dbt}.T1 ${dbh}.H1
-  GraphAdd $obj K_5 T_$name
-  GraphAdd $obj.set K_5 T_${name}_set $setcol
-  # GraphAdd $obj.pow W_3 pow_$name
-  # GraphAdd $obj.raw Ohm_3 R_$name
-}
-
-itcchan twstill wupstill MB1 MB0 blue cyan
-
-itcchan tonek oneK DB5 DB3 red orange
-
-itcchan twmix wupMix DB6 DB1 green lightgreen
-
-itcchan twivc wupIVC DB7 DB2 magenta violet
-
-itcchan tcond cond DB8 DB3 yellow grey
-
-triton temp tsorb sorb T1 dark_violet
-triton temp tivc IVC T2 brown
-triton temp tstill still T3 orange
-triton temp tcp cond T4 grey
-triton temp tmix mix T5 cyan H1
-
-triton press pdump dump P1 cyan
-triton press pcond cond P2 blue
-triton press pstill still P3 black
-triton press pfore fore P4 green
-triton press pback back P5 red
-
-makenv tmixdrv -driver drvpar /tmix
-
-defineTemperature tmixdrv
-
-
diff --git a/tcl/drivers/ccu4ext.tcl b/tcl/drivers/ccu4ext.tcl
index 4292795..5e3e837 100644
--- a/tcl/drivers/ccu4ext.tcl
+++ b/tcl/drivers/ccu4ext.tcl
@@ -3,7 +3,7 @@ namespace eval ccu4ext {
 }
 
 # automatic fill with level reading from external source
-proc stdConfig::ccu4ext {type {readlevel 0}} {
+proc stdConfig::ccu4ext {type {readpath 0}} {
   
   variable node
   variable ctrl
@@ -27,13 +27,14 @@ proc stdConfig::ccu4ext {type {readlevel 0}} {
 
     node state upd -text
 
-    node readlevel -text par $readlevel
+    node readpath -text par $readpath
     prop visible false
     node lowlevel par 10
     node highlevel par 100
     
     node smooth upd
     prop fmt %.7g
+    prop geterror undefined
     default -1
 
     node minfillminutes par 3.0
@@ -89,7 +90,7 @@ proc ccu4ext::changestate {type state} {
 
 proc ccu4ext::calcsmooth {level minspeed maxspeed} {
   if {![string is double $level]} {
-    return 999.9
+    return 199
   }
   set now [clock seconds]
   set lasttime [silent 0 sct lasttime]
@@ -98,10 +99,7 @@ proc ccu4ext::calcsmooth {level minspeed maxspeed} {
   }
   set delta [expr $now - $lasttime]
   sct lasttime $now
-  set smooth [hvali [sct]/smooth]
-  if {$smooth < 0} {
-    set smooth $level
-  }
+  set smooth [silent $level hvali [sct]/smooth]
   set gs [expr $smooth + $delta * $maxspeed]
   if {$level > $gs} {
     set smooth $gs
@@ -126,6 +124,7 @@ proc ccu4ext::calcsmooth {level minspeed maxspeed} {
     }
   }
   hupdate [sct]/smooth $smooth
+  hdelprop [sct]/smooth geterror
   return $smooth
 }
 
@@ -148,7 +147,8 @@ proc ccu4ext::fillExt {type} {
     }
   }
   set errtxt ""
-  set sm [expr [DoubleTime] > [silent 0 sct change_time] + 10]
+  set now [DoubleTime]
+  set sm [expr $now > [silent 0 sct change_time] + 10]
   switch -- $valve {
     0 {
       set txt "fill valve off"
@@ -178,6 +178,12 @@ proc ccu4ext::fillExt {type} {
       set errtxt "unknown error"
     }
   }
+  set rdpath [hvali [sct]/readpath]
+  set level [hvali $rdpath]
+  set levelerror [silent "" hgetpropval $rdpath geterror]
+  if {$levelerror ne "" && $errtxt eq "" && [hvali [sct]] < 2} {
+    set errtxt "$txt ($rdpath $levelerror)"
+  }
   if {$errtxt eq ""} {
     updateval [sct]/state $txt
     hupdate [sct]/status ""
@@ -189,11 +195,6 @@ proc ccu4ext::fillExt {type} {
     changestate $type fill
     return idle
   }
-  set level [silent invalid result [hvali [sct]/readlevel]]
-  if {! [string is double $level]} {
-    hsetprop [sct]/readlevel geterror "illegal $type level reading"
-    return idle
-  }
   set state [sctval [sct]]
   set now [clock seconds]
   set lowlevel [hvali [sct]/lowlevel]
@@ -219,6 +220,7 @@ proc ccu4ext::fillExt {type} {
       return idle
     }
     0 { # watching
+      validated_level
       set minspeed [expr - 100.0 / [hvali [sct]/minholdhours] / 3600.]
       set maxspeed [expr - 100.0 / [hvali [sct]/maxholdhours] / 3600.]
       set s [calcsmooth $level $minspeed $maxspeed]
@@ -231,13 +233,18 @@ proc ccu4ext::fillExt {type} {
         }
         # start fill
         hset [sct] 1
-        clientput "$type level low - start fill"
+        clientput "$type level low ($level smooth $s) - start fill"
       } else {
         changestate $type stop
       }
       return idle
     }
-    1 {
+    1 { # filling
+      if {[validated_level] eq ""} {
+        hset [sct] 2
+        changestate $type off
+        return idle
+      }
       set vcmd [silent 0 sct vessel_cmd]
       # check that vessel command works
       if {$vcmd ne "0" && [catch {[result $vcmd]}]} {
@@ -246,7 +253,7 @@ proc ccu4ext::fillExt {type} {
          set vmd 0
       }
       set now [clock seconds]
-      set s [hvali [sct]/smooth]
+      set s [silent $level hval [sct]/smooth]
       sct minlevel [silent 999 sct minlevel]
       if {$s < [sct minlevel]} {
         sct minlevel $s
@@ -321,12 +328,30 @@ proc ccu4ext::fillExt {type} {
   return idle
 }
 
+proc ccu4ext::validated_level {} {
+  set rdpath [hval [sct]/readpath]
+  if {[DoubleTime] < [silent 0 hgetpropval $rdpath read_time] + 30} {
+     return [hval $rdpath]
+  }
+  if {[silent "" hgetpropval $rdpath geterror] eq ""} {
+    clientlog "ERROR: no reading of $rdpath within 30 sec"
+  }
+  hsetprop $rdpath geterror not_available
+  return ""
+}
+
 proc ccu4ext::writeExt {type {activate 1}} {
   sct update [sct target]
-  hupdate [sct]/smooth [silent 0 result [hvali [sct]/readlevel]]
   switch -- [sct target] {
 # watching
     0 {
+      set level [validated_level]
+      if {$level eq ""} {
+        changestate $type off
+        sct update 2
+        return idle
+      }
+      hupdate [sct]/smooth $level
       catch {logsetup [sct]/vext clear}
       hupdate [sct]/status ""
       eval [silent "expr 0" sct slow_cmd]
@@ -350,6 +375,13 @@ proc ccu4ext::writeExt {type {activate 1}} {
     }
 # fill
     1 {
+      set level [validated_level]
+      if {$level eq ""} {
+        changestate $type off
+        sct update 2
+        return idle
+      }
+      hupdate [sct]/smooth $level
       hupdate [sct]/status ""
       set vcmd [silent 0 sct vessel_cmd]
       if {$vcmd ne "0"} {
diff --git a/tcl/drivers/ccu4flow.tcl b/tcl/drivers/ccu4flow.tcl
index ef0bbfe..56c32ea 100644
--- a/tcl/drivers/ccu4flow.tcl
+++ b/tcl/drivers/ccu4flow.tcl
@@ -8,7 +8,7 @@ proc stdConfig::ccu4flow {args} {
 
   obj ccu4flow wr
   prop write ccu4flow::setmode
-  prop read "ccu4flow::read [silent 0 result instconfig sensirion]"
+  prop read ccu4flow::read
   prop dir 1
   prop enum fixed=0,controlled=1,automatic=2,close=3,open=4
   prop filter 0
@@ -28,10 +28,14 @@ proc stdConfig::ccu4flow {args} {
   prop lastmov 0
   prop hystpulse 0
   prop lastist 0
+  set sensirion 0
   foreach arg $args {
     if {$arg eq "release_blocked"} {
       prop release_blocked 1
     }
+    if {$arg eq "1"} {
+      set sensirion 1
+    }
   }
   default 0
   kids "needle valve" {
@@ -48,29 +52,35 @@ proc stdConfig::ccu4flow {args} {
 
     node flowmax par 20
     prop label "flow maximum"
-    
+
     node flowp upd
+    prop help "flow calculated from pressure before pump"
+
     node span upd
-    
+
+    node use_pressure par -int [expr !$sensirion]
+    prop enum 1
+    prop help "use pressure instead of flow meter for control"
+
     node ctrl -none
     kids "control parameters" {
       node regtext upd -text
       default regulate
       prop label status
       prop width 40
-      
-      node prop_o par 0.1
+
+      node prop_o par 0.05
       prop help {prop [sec/mbar] when opening. above 4 mbar a 10 times lower value is used}
 
-      node prop_c par 0.05
+      node prop_c par 0.03
       prop help {prop [sec/mbar] when closing. above 4 mbar a 10 times lower value is used}
-    
+
       node deriv_o par 30
       prop help {convergence target time [sec] when opening}
 
       node deriv_c par 30
       prop help {convergence target time [sec] when closing}
-    
+
       node minpulse_o out
       default 0.05
       prop help {minimum close pulse [sec]}
@@ -92,11 +102,11 @@ proc stdConfig::ccu4flow {args} {
       node tol par 0.25
       prop label tolerance
       prop help {valid below 3 mbar}
-    
+
       node tolhigh par 0.5
       prop label tol. above 4
       prop help {valid above 4 mbar}
-    
+
       node openpulse par 60
       prop help {time to open from completely closed to a significant opening}
 
@@ -104,7 +114,7 @@ proc stdConfig::ccu4flow {args} {
       prop enum 1
       prop help {adjust minpulse automatically}
     }
-    
+
     node autoflow -none
     kids "autoflow control parameters" {
       flow::make ccu4flow::tmts {result tt set/reg}
@@ -112,7 +122,7 @@ proc stdConfig::ccu4flow {args} {
     node calib -none
     kids calib {
       node ln_per_min_per_mbar par 0.9
-      node mbar_offset par 0.5
+      node mbar_offset par 0.8
     }
   }
 }
@@ -158,21 +168,19 @@ proc ccu4flow::check_minpulse {dir} {
   sct update [sct target]
 }
 
-proc ccu4flow::read {{sensirion 0}} {
+proc ccu4flow::read {} {
   hsetprop /cc/fa nvpath [sct]
   _cc updatescript /cc/fa ccu4flow::updatemode
   hsetprop /cc/f nvpath [sct]
-  if {$sensirion} {
-    hsetprop /nvflow flowsource flowmeter
+  hsetprop /cc/f nvctrl [sct controller]
+  hsetprop /cc/f flowsource pressure
+  _cc updatescript /cc/f ccu4flow::updateflow
+  catch {
+    hsetprop /nvflow flowsource flow
     hsetprop /nvflow nvpath [sct]
     hsetprop /nvflow nvctrl [sct controller]
     _hemot updatescript /nvflow ccu4flow::updateflow
-    hsetprop /cc/f flowsource pressref
-  } else {
-    hsetprop /cc/f nvctrl [sct controller]
-    hsetprop /cc/f flowsource flowpress
   }
-  _cc updatescript /cc/f ccu4flow::updateflow
   return unpoll
 }
 
@@ -220,11 +228,10 @@ proc ccu4flow::updatemode {value} {
 
 proc ccu4flow::updateflow {value} {
   # flowsource:
-  #    pressref: just update nv/flowp
-  #    flowmeter: update nv/flow
-  #    flowpress: flow from pressure
+  #   pressure: this is a pressure
+  #   flow: this is a flow from a flowmeter
 
-  set source [silent pressure sct flowsource]
+  set source [silent none sct flowsource]
   set n [silent 9 sct filter_n]
   set filter [lrange "[silent $value sct filter] $value" end-$n end]
   sct filter $filter
@@ -257,9 +264,9 @@ proc ccu4flow::updateflow {value} {
     }
   }
   sct filtered $flow
-  if {$source eq "flowmeter"} {
+  if {$source eq "flow"} {
     updateval [sct nvpath]/flow $flow
-  } else {
+  } elseif {$source eq "pressure"} {
     if {$flow < -50} {
       set flow -62.5
     } else {
@@ -267,12 +274,10 @@ proc ccu4flow::updateflow {value} {
       set fpm [hval [sct nvpath]/calib/ln_per_min_per_mbar]
       set flow [expr ($flow - $off) * $fpm]
     }
-    if {$source eq "pressref"} {
-      hupdate [sct nvpath]/flowp $flow
-      return 
-    }
-    updateval_e [sct nvpath]/flow $flow -62.5 no_sensor
+    updateval_e [sct nvpath]/flowp $flow -62.5 no_sensor
     hupdate [sct nvpath]/span $span
+  } else {
+    error "[sct] illegal flowsource: $source"
   }
   [sct nvctrl] queue [sct nvpath] read ccu4flow::ctrl
 }
@@ -384,7 +389,11 @@ proc ccu4flow::ctrl {} {
   }
   set regstate [sct regstate]
   set now [DoubleTime]
-  set ist [hvali [sct]/flow]
+  if {[hval [sct]/use_pressure]} {
+    set ist [hvali [sct]/flowp]
+  } else {
+    set ist [hvali [sct]/flow]
+  }
   set tol [hvali [sct]/ctrl/tol]
   set tolhigh [hvali [sct]/ctrl/tolhigh]
   set closestate 0
diff --git a/tcl/drivers/dil12.tcl b/tcl/drivers/dil12.tcl
index baef43a..4aa078e 100644
--- a/tcl/drivers/dil12.tcl
+++ b/tcl/drivers/dil12.tcl
@@ -821,8 +821,8 @@ proc dil12::autostep {phase init} {
             dil12::msg "pump for 15 more seconds"
           }
         }
-      } elseif {[sct pumptime] != 0} {
-        dil12::msg "there might be some mixure in TRAP A, please check"
+      # } elseif {[sct pumptime] != 0} {
+      #  dil12::msg "there might be some mixure in TRAP A, please check"
       }
     }
     init_pipes_ready {
diff --git a/tcl/drivers/hepump.tcl b/tcl/drivers/hepump.tcl
index 1cdeb09..14d277e 100644
--- a/tcl/drivers/hepump.tcl
+++ b/tcl/drivers/hepump.tcl
@@ -160,29 +160,33 @@ proc hepump::set_calib {} {
     hsetprop /nv off_reason "pump mode changed"
     sct print "pump mode change: suspend needle valve control for 20 sec."
   }
-  return idle  
+  return idle
 }
 
 proc hepump::read {} {
-  set p [expr [silent 0 result cc f] * [silent 0.6 hvali /nv/calib/ln_per_min_per_mbar]]
-  set f [silent 0 result nvflow]
-  if {[hvali [sct]/eco] == 0 && $p > 1  && $f > 0.5 && $f < 25} {
-    set health [expr 100 * $f / ($p / 1.2 - 0.5)]
-    set health [expr [silent $health sct health] * 0.95 + 0.05 * $health]
-    sct health $health
-    if {abs($health - [silent 0 hval [sct]/health]) > 1} {
-      sct health_cnt 0
-      hupdate [sct]/health [format %.1f $health]
-    } else {
-      sct health_cnt [expr [sct health_cnt] + 1]
-      if {[sct health_cnt] == 10} {
-        if {$health > 100} {set health 100}
-        catch {prep0 / pump_health_update [result instrument] [format %.0f $health]} msg
-      }
+  set p [silent 0 result nv flowp]
+  set f [silent 0 result nv flow]
+  set p_buf [silent 0 sct p_buf]
+  set f_buf [silent 0 sct f_buf]
+  lappend p_buf $p
+  lappend f_buf $f
+  sct p_buf [lrange $p_buf end-30 end]
+  sct f_buf [lrange $f_buf end-30 end]
+  set pmin [tcl::mathfunc::min {*}$p_buf]
+  set pmax [tcl::mathfunc::max {*}$p_buf]
+  set fmin [tcl::mathfunc::min {*}$f_buf]
+  set fmax [tcl::mathfunc::max {*}$f_buf]
+  if {[silent 0 hval [sct]/eco] == 0 && $pmin >= 1 && $fmin >= 0.5 && $fmin < 25} {
+    set hmax [expr round(100 * $fmax / ($pmin - 0.4))]
+    set hmin [expr round(100 * $fmin / ($pmax - 0.4))]
+    set health [silent 100 hval [sct]/health]
+    if {$hmax < $health} {
+      set health $hmax
+    } elseif {$hmin > $health} {
+      set health $hmin
     }
-  } else {
-    # reset filter
-    hdelprop [sct] health
+    hupdate [sct]/health $health
+    catch {prep0 / pump_health_update [result instrument] [expr min($health, 100)]} msg
   }
   return [hepump::set_calib]
 }
@@ -401,7 +405,9 @@ proc hepump::get_auto {} {
     set eco [sctval [sct parent]/eco]
     set lim [sctval [sct parent]/eco_t_lim 7]
     set target [silent [silent $lim hval /tt/target] hval /tt/set/reg]
-    if {$target < $lim && [silent $lim hval /tt] < 2 * $lim} {
+    if {[silent 0 result nv use_pressure]} {
+      set ecoset 0
+    } elseif {$target < $lim && [silent $lim hval /tt] < 2 * $lim} {
       set ecoset 0
     } elseif {$target > $lim || [silent $lim hval /tt] > 3 * $lim} {
       set ecoset 1
diff --git a/tcl/drivers/lsc.tcl b/tcl/drivers/lsc.tcl
index e68183a..d18394a 100644
--- a/tcl/drivers/lsc.tcl
+++ b/tcl/drivers/lsc.tcl
@@ -895,7 +895,7 @@ proc lsc::set_curve {} {
 }
 
 #write action, direct
-proc lsc::check_header {id} {
+proc lsc::check_header {{id unknown}} {
   upvar #0 lsc::cache_$id cache
   if {[lsc::hdreq $cache([sct curveno]) [sct result]]} {
     sct oldhdr [sct result]
@@ -4628,6 +4628,7 @@ proc stdConfig::lsc_end {} {
   if {$lsc(samplesensor) eq ""} {
     set lsc(samplesensor) $lsc(mainsensor)
   }
+  dolater 0 fix_stick_sensors
   hsetprop $path getcmd "hvali $path/$lsc(mainsensor)"
   hsetprop $path getsample "hvali $path/$lsc(samplesensor)"
   if {[silent "" set lsc(setsample)] ne ""} {
diff --git a/tcl/drivers/nvstep.tcl b/tcl/drivers/nvstep.tcl
index 67541d3..c257f67 100644
--- a/tcl/drivers/nvstep.tcl
+++ b/tcl/drivers/nvstep.tcl
@@ -1,7 +1,7 @@
 namespace eval nvstep {
 }
 
-proc stdConfig::nvstep {} {
+proc stdConfig::nvstep {args} {
   variable name
 
   controller syncedprot
@@ -9,7 +9,7 @@ proc stdConfig::nvstep {} {
 
   obj NvStep wr
   prop write nvstep::write
-  prop read "nvstep::read [silent 0 result instconfig sensirion]"
+  prop read nvstep::read
   prop enum fixed=0,controlled=1,automatic=2,close=3,open=4
   prop write nvstep::write
   prop lastpulse 0
@@ -22,6 +22,13 @@ proc stdConfig::nvstep {} {
   prop maxflow 0
   default 0
 
+  set sensirion 0
+  foreach arg $args {
+    if {$arg eq "1"} {
+      set sensirion 1
+    }
+  }
+
   kids "needle value" {
     node flow upd
 
@@ -39,6 +46,10 @@ proc stdConfig::nvstep {} {
     node flowp upd
     prop help "flow calculated from pressure before pump"
 
+    node use_pressure par -int [expr !$sensirion]
+    prop enum 1
+    prop help "use pressure instead of flow meter for control"
+
     node ctrl -none
     kids "control parameters" {
       node prop par 10
@@ -172,7 +183,11 @@ proc nvstep::poll {} {
           hupdate [sct]/status $umsg
         }
       }
-      set ist [hvali [sct]/flow]
+      if {[hval [sct]/use_pressure]} {
+        set ist [hvali [sct]/flowp]
+      } else {
+        set ist [hvali [sct]/flow]
+      }
       set tol [hvali [sct]/ctrl/tol]
       set a [sct amplitude]
       set t [sct t_after_delay]
@@ -270,29 +285,26 @@ proc nvstep::poll {} {
   return idle
 }
 
-proc nvstep::read {{sensirion 0}} {
+proc nvstep::read {} {
   hsetprop /cc/fa nvpath [sct]
   _cc updatescript /cc/fa nvstep::updatemode
   hsetprop /cc/f nvpath [sct]
-  if {$sensirion} {
-    hsetprop /nvflow flowsource flowmeter
+  hsetprop /cc/f nvctrl [sct controller]
+  hsetprop /cc/f flowsource pressure
+  _cc updatescript /cc/f nvstep::updateflow
+  catch {
+    hsetprop /nvflow flowsource flow
     hsetprop /nvflow nvpath [sct]
     hsetprop /nvflow nvctrl [sct controller]
     _hemot updatescript /nvflow nvstep::updateflow
-    hsetprop /cc/f flowsource pressref
-  } else {
-    hsetprop /cc/f nvctrl [sct controller]
-    hsetprop /cc/f flowsource flowpress
   }
-  _cc updatescript /cc/f nvstep::updateflow
   return unpoll
 }
 
 proc nvstep::updateflow {value} {
   # flowsource:
-  #    pressref: just update nv/flowp
-  #    flowmeter: update nv/flow
-  #    flowpress: flow from pressure
+  #   pressure: this is a pressure
+  #   flow: this is a flow from a flowmeter
 
   set source [silent pressure sct flowsource]
   set filter [lrange "[silent $value sct filter] $value" end-9 10]
@@ -317,21 +329,27 @@ proc nvstep::updateflow {value} {
     }
   }
   sct filtered $flow
-  if {$source eq "flowmeter"} {
+  if {$source eq "flow"} {
+    if {$flow < 1} {
+      # avoid negative flow values, but it smooth]
+      set flow [expr exp($flow - 1)]
+    }
     updateval [sct nvpath]/flow $flow
-  } else {
+  } elseif {$source eq "pressure" {
     if {$flow < -50} {
       set flow -62.5
     } else {
       set off [hval [sct nvpath]/calib/mbar_offset]
       set fpm [hval [sct nvpath]/calib/ln_per_min_per_mbar]
       set flow [expr ($flow - $off) * $fpm]
+      if {$flow < 1} {
+        # avoid negative flow values, but keep it smooth]
+        set flow [expr exp($flow - 1)]
+      }
     }
-    if {$source eq "pressref"} {
-      hupdate [sct nvpath]/flowp $flow
-      return 
-    }
-    updateval_e [sct nvpath]/flow $flow -62.5 no_sensor
+    updateval_e [sct nvpath]/flowp $flow -62.5 no_sensor
+  } else {
+    error "[sct] illegal flowsource: $source"
   }
   [sct nvctrl] queue [sct nvpath] read nvstep::poll
 }
diff --git a/tcl/drivers/sensirion.tcl b/tcl/drivers/sensirion.tcl
index 3806849..6e8438e 100644
--- a/tcl/drivers/sensirion.tcl
+++ b/tcl/drivers/sensirion.tcl
@@ -61,11 +61,11 @@ proc stdConfig::sensirion {} {
 
 proc sensirion::updateFlow {} {
   lassign [sct result] flow stddev
-  if {$flow == 0 && $stddev == 0} {
-    if {[hgetpropval /nvflow flowsource] eq "flowmeter"} {
-       hsetprop /nvflow flowsource flowpress
-       hepump eco 0
-       error "invalid flow -> switched to pressure"
+  if {$flow == 0 && $stddev == 0 || [silent 0 sct simerror]} {
+    set use_pressure [silent 0 hval /nv/use_pressure]
+    if {! $use_pressure} {
+       hset /nv/use_pressure 1
+       clientput "ERROR: invalid flow -> switched to pressure"
     }
   }
   sct update $flow
diff --git a/tcl/ill5.config b/tcl/ill5.config
index 703deec..f6fdc39 100644
--- a/tcl/ill5.config
+++ b/tcl/ill5.config
@@ -13,5 +13,8 @@ tt set/limit 310
 makeCCU4 ill5 nv n2 he
 nv set 1
 
+nv ctrl/prop_o 0.05
+nv ctrl/prop_c 0.03 
+
 source maxi_orange.table
 
diff --git a/tcl/ma6.config b/tcl/ma6.config
index 27c7ad0..3c34aef 100644
--- a/tcl/ma6.config
+++ b/tcl/ma6.config
@@ -5,11 +5,11 @@ device stick_menu "ma6 dil2 dil3 dil4 coil"
 
 makenv tt -driver [lsdriver] {
   lsc_sensor tm A -sensor x48581 -sensorname VTI
+  lsc_sensor ts C -sensorname sample
+  lsc_sensor ts_2 D  -sensor code -sensorname sample2
 # 2023-07-06: sample sensor seems defect, use hx sensor
-#  lsc_sensor ts C -sensorname sample
-#  lsc_sensor ts_2 D  -sensor code -sensorname sample2
-  lsc_sensor ts D -sensorname sample
-  lsc_sensor ts_2 C  -sensor code -sensorname sample2
+#  lsc_sensor ts D -sensorname sample
+#  lsc_sensor ts_2 C  -sensor code -sensorname sample2
   lsc_loop set -loop 1 -channel A -maxheater 32W -resist 80Ohm -color green
   if {[lsdriver] eq "336_lsc"} {
     lsc_loop setsamp -loop 2 -channel C -maxheater 62.5W -resist 20Ohm -color dark_green -loopname sample
@@ -20,7 +20,7 @@ makenv tt -driver [lsdriver] {
 
 makeCCU4 ma6 nv he_ilm
 
-hupdate /nv/set 1.2
+hupdate /nv/set 1.5
 makeN2Fill ccu4ilm {
   ln2fill lowlevel 10
   ln2fill highlevel 100
diff --git a/tcl/ma6.stick b/tcl/ma6.stick
index 9870b81..a1fbd2c 100644
--- a/tcl/ma6.stick
+++ b/tcl/ma6.stick
@@ -1,4 +1,4 @@
 stickDesc = standard MA6 stick
 
-stick_sensors x63163 undefined
-# stick_sensors x63161 x63163
+stick_sensors x63161 undefined
+#stick_sensors x63161 x63163  # sensor 2 wiring defect
diff --git a/tcl/mb11.config b/tcl/mb11.config
index bef6fac..9478384 100644
--- a/tcl/mb11.config
+++ b/tcl/mb11.config
@@ -1,4 +1,4 @@
-deviceDesc = FRAPPY history recorder, with stick
+deviceDesc = MB11 Frappy history recorder
 
 set ::secop_version 4
 
@@ -11,6 +11,5 @@ if {[string match "prep*" $ins]} {
   error "runs on instruments or prep0-9 only"
 } else {
   makenv frappy_main -driver secop -port localhost:15101
-  makenv frappy_stick -driver secop -port localhost:15201
   makeHePump
 }
diff --git a/tcl/mb11.stick b/tcl/mb11.stick
new file mode 100644
index 0000000..613f28f
--- /dev/null
+++ b/tcl/mb11.stick
@@ -0,0 +1,13 @@
+deviceDesc = MB11 stick Frappy history recorder
+
+set ::secop_version 4
+
+set ins [result instrument]
+if {[string match "prep*" $ins]} {
+  set nr [string range $ins end end]
+  makenv frappy_stick -driver secop -port localhost:1521$nr
+} elseif {[lindex [split [info hostname] .] 0] ne $ins} {
+  error "runs on instruments or prep0-9 only"
+} else {
+  makenv frappy_stick -driver secop -port localhost:15201
+}
diff --git a/tcl/seacom.tcl b/tcl/seacom.tcl
index eadf5de..260c381 100644
--- a/tcl/seacom.tcl
+++ b/tcl/seacom.tcl
@@ -628,7 +628,7 @@ proc stick_sensors {sensor1 sensor2} {
   source config/stick.list
   if {[string match "code*" $sensor2]} {
     set code [lindex [split $sensor2=0 =] 1]
-    set table_code [silent -1 set stick_cfgtable($stick_name)]
+    set table_code [silent 0 set stick_cfgtable($stick_name)]
     if {$table_code != $code} {
       clientput "ERROR: code $code in $stick_name.stick does not match value from config/sticklist: $table_code"
     }
@@ -652,6 +652,16 @@ proc stick_sensors {sensor1 sensor2} {
   }
 }
 
+proc fix_stick_sensors {} {
+  # fix stick sensors
+  foreach path {/tt/ts/curve /tt/ts_2/curve} {
+     set curv [silent "" sctval $path]
+     if {$curv ne ""} {
+       hset $path $curv
+     }
+  }
+}
+
 proc ts_sensor {sensor} {
   catch {
     catch {
diff --git a/tcl/startup/autofill.tcl b/tcl/startup/autofill.tcl
index ebb203a..6cbbf6c 100644
--- a/tcl/startup/autofill.tcl
+++ b/tcl/startup/autofill.tcl
@@ -19,7 +19,7 @@ proc makeHeFill {levcmd} {
     if {$levcmd eq "ccu"} {
       makenv hefill he_ext_ccu ccu
     } elseif {$levcmd eq "ccu4ilm"} {
-      makenv hefill -driver ccu4ext he lev
+      makenv hefill -driver ccu4ext he /lev
       lappend fast_cmd {lev mode 1}
       lappend slow_cmd {lev mode 0}
     } else {
@@ -90,7 +90,7 @@ proc makeN2Fill {{option ccu} {code 0}} {
     GraphAdd n2.upper K_2 N2_Upper red
     GraphAdd n2.lower K_2 N2_Lower green
   } elseif {$option eq "ccu4ilm"} {
-    makenv ln2fill -driver ccu4ext n2 "lev n2"
+    makenv ln2fill -driver ccu4ext n2 /lev/n2
     GraphAdd lev.n2 % "N2_level" black
     if {! $c} {
       # switch silently to inactive
diff --git a/tcl/startup/ccu4make.tcl b/tcl/startup/ccu4make.tcl
index 2143b2a..1a12085 100644
--- a/tcl/startup/ccu4make.tcl
+++ b/tcl/startup/ccu4make.tcl
@@ -20,13 +20,14 @@ proc makeCCU4 {args} {
   set badargs [list]
   set cfgdev "0"
   set hepump 0
+  set sensirion [silent 0 result instconfig sensirion]
   foreach arg $args {
     switch $arg {
       nv - nv_release_blocked {
         if {$arg eq "nv_release_blocked"} {
-          makenv nv -driver ccu4flow release_blocked
+          makenv nv -driver ccu4flow release_blocked $sensirion
         } else {
-          makenv nv -driver ccu4flow
+          makenv nv -driver ccu4flow $sensirion
         }
 #        GraphAdd cc.f mbar nv_flow red
         GraphAdd nv.flow ln/min nv_flow magenta
@@ -117,6 +118,7 @@ proc makeCCU4 {args} {
   }
   if {$hepump} {
     makeHePump
+    hsetprop /nv hepump /hepump
   }
   set cfg [ccu4_get_device_config $cfgdev codesfile]
   if {$cfg eq "" || [llength $badargs] > 0} {
diff --git a/tcl/startup/dilpars.tcl b/tcl/startup/dilpars.tcl
new file mode 100644
index 0000000..6d97a17
--- /dev/null
+++ b/tcl/startup/dilpars.tcl
@@ -0,0 +1,8 @@
+proc apply_dilpars {} {
+  catch {
+    ts auto/condenseflow [hval dilpars/condenseflow]
+  }
+  catch {
+    ts auto/circulateflow [hval dilpars/circulateflow]
+  }
+}
diff --git a/tcl/startup/flow_ctrl.tcl b/tcl/startup/flow_ctrl.tcl
index e63be9c..adf03d1 100644
--- a/tcl/startup/flow_ctrl.tcl
+++ b/tcl/startup/flow_ctrl.tcl
@@ -161,7 +161,7 @@ proc flow::make {{getT flow::tmts} {getS "result tt tr"} {getF "result nv flow"}
     node difRange par 7
     node flowSize par 10
     node convTime par 30
-    node Tmin par 1.5
+    node Tmin par 10
     node script -text par "flow::task"
     prop width 24
     node getTemp -text par "$getT"
diff --git a/tcl/startup/frappy.tcl b/tcl/startup/frappy.tcl
index 748a3b5..4621fa6 100644
--- a/tcl/startup/frappy.tcl
+++ b/tcl/startup/frappy.tcl
@@ -177,7 +177,7 @@ proc get_param_values {hp} {
 }
 
 proc check_or_do {doit service cfgs} {
-  # result: 1: no change needed, 0: change needed, 2: failure
+  # result: 1: no change needed, 0: change needed, "ERROR:...": failure
   set result 1
   set config ""
   set stick ""
@@ -199,7 +199,7 @@ proc check_or_do {doit service cfgs} {
       if {$doit} {
         if {[hval /device/confirmed] eq [hval /device/name]} {
           set msg "do not allow frappy to change from [hval /device/name] to $config"
-          clientlog $msg
+          clientlog ERROR:$msg
           return $msg
         }
         clientlog 0