diff --git a/tcl/drivers/trun.tcl b/tcl/drivers/trun.tcl
index 6f679d4..7390b86 100644
--- a/tcl/drivers/trun.tcl
+++ b/tcl/drivers/trun.tcl
@@ -497,9 +497,10 @@ proc trun::read_run {} {
   set now [DoubleTime]
   set tr [silent none sct target]
   set prev_tr [silent $tr sct prev_tr]
+  sct prev_tr $tr
   if {$tr eq "none"} {
     set tr $tmain
-    sct prev_tr $tr
+    sct prev_tr $tmain
   } else {
     set dif [expr $tr - $prev_tr]
     updateval_u [sct]/target $tr 0
diff --git a/tcl/startup/ccu4make.tcl b/tcl/startup/ccu4make.tcl
index 1a12085..1ab1a43 100644
--- a/tcl/startup/ccu4make.tcl
+++ b/tcl/startup/ccu4make.tcl
@@ -41,7 +41,7 @@ proc makeCCU4 {args} {
         set hepump 1
       }
       nvstep {
-        makenv nv nvstep
+        makenv nv -driver nvstep $sensirion
         GraphAdd nv.flow ln/min nv_flow magenta
         GraphAdd nv.autoflow.flowtarget ln/min nv_set green
         if {[silent 0 result instconfig sensirion]} {
diff --git a/tcl/startup/flow_ctrl.tcl b/tcl/startup/flow_ctrl.tcl
index adf03d1..e63be9c 100644
--- a/tcl/startup/flow_ctrl.tcl
+++ b/tcl/startup/flow_ctrl.tcl
@@ -161,7 +161,7 @@ proc flow::make {{getT flow::tmts} {getS "result tt tr"} {getF "result nv flow"}
     node difRange par 7
     node flowSize par 10
     node convTime par 30
-    node Tmin par 10
+    node Tmin par 1.5
     node script -text par "flow::task"
     prop width 24
     node getTemp -text par "$getT"