diff --git a/cfg/stick/dil5_cfg.py b/cfg/stick/dil5_cfg.py
index 2b55bc8..82cf7c5 100644
--- a/cfg/stick/dil5_cfg.py
+++ b/cfg/stick/dil5_cfg.py
@@ -11,7 +11,7 @@ Mod('triton',
     timeout=25.0,
 )
 
-Mod('ts',
+Mod('T_mix',
     'frappy_psi.triton.TemperatureLoop',
     'mix. chamber temperature',
     slot='T5',
@@ -24,9 +24,21 @@ Mod('htr_mix',
     'mix. chamber heater',
     slot='H1,T5',
     io='triton',
-    resistivity = 100
+    resistivity = 100,
 )
 
+Mod('ts',
+    'frappy_psi.picontrol.PI',
+    'softloop controlled Temperature mixing chamber',
+    meaning=['temperature', 20],
+    input_module = 'T_mix',
+    output_module = 'htr_mix',
+    control_active = 1,
+    output_range = (0, 100000),
+    p = 20000,
+    i = 100,
+   )
+
 Mod('htr_sorb',
     'frappy_psi.triton.HeaterOutput',
     'sorb heater',
@@ -124,12 +136,12 @@ Mod('T_still_wup',
     io='itc',
 )
 
-Mod('htr_still_wup',
-    'frappy_psi.mercury.HeaterOutput',
-    'still warmup heater',
-    slot='MB0.H1',
-    io='itc',
-)
+#Mod('htr_still_wup',
+#    'frappy_psi.mercury.HeaterOutput',
+#    'still warmup heater',
+#    slot='MB0.H1',
+#    io='itc',
+#)
 
 Mod('T_one_K',
     'frappy_psi.mercury.TemperatureLoop',
diff --git a/frappy_psi/picontrol.py b/frappy_psi/picontrol.py
index be201d5..47c59ae 100644
--- a/frappy_psi/picontrol.py
+++ b/frappy_psi/picontrol.py
@@ -125,7 +125,8 @@ class PImixin(HasOutputModule, Writable):
             self.activate_control()
 
 
-class PI(Writable):
+# quick fix by Marek:
+class PIobsolete(Writable):
     """temporary, but working version from Marek"""
     input = Attached(Readable, 'the input module')
     output = Attached(Writable, 'the output module')
@@ -181,7 +182,7 @@ class PI(Writable):
 # - tries to determine the output limits automatically
 # unchecked!
 
-class PIproposed(HasConvergence, PImixin):
+class PI(HasConvergence, PImixin):
     input_module = Attached(Readable, 'the input module')
 
     def read_value(self):