diff --git a/script/MultiRegionScan.py b/script/MultiRegionScan.py
index c33c3901..f4738ae5 100644
--- a/script/MultiRegionScan.py
+++ b/script/MultiRegionScan.py
@@ -97,9 +97,6 @@ def check_region(region):
     if 'cis' not in region:
         region['cis'] = False
         print("region {0}: setting default cis = {1}".format(region['name'], region['cis']))
-    if 'slit' not in region:
-        region['slit'] = ExitSlit.take(100)
-        print("region {0}: setting default slit = {1}".format(region['name'], region['slit']))
         
 class SpectrumReader(ReadonlyRegisterBase, ReadonlyRegisterArray):
     def initialize(self):
@@ -109,26 +106,32 @@ class SpectrumReader(ReadonlyRegisterBase, ReadonlyRegisterArray):
     def create_datasets(self):
         path = get_exec_pars().scanPath + self.region_name + "/"
 
-        self.channel_begin_dataset_name = path + "ScientaChannelBegin"
-        self.channel_end_dataset_name = path + "ScientaChannelEnd"
-        self.channel_center_dataset_name = path + "ScientaChannelCenter"
-        self.pass_energy_dataset_name = path + "ScientaPassEnergy"
-        self.step_energy_dataset_name = path + "ScientaStepEnergy"
-        self.step_time_dataset_name = path + "ScientaStepTime"
-        self.iterations_dataset_name = path + "ScientaIterations"
-        self.slit_dataset_name = path + "ExitSlit"
+        if self.region['fixed']:
+            self.channel_center_dataset_name = path + "ScientaChannelCenter"
+            create_dataset(self.channel_center_dataset_name, 'd')
+        else:
+            self.channel_begin_dataset_name = path + "ScientaChannelBegin"
+            self.channel_end_dataset_name = path + "ScientaChannelEnd"
+            self.step_energy_dataset_name = path + "ScientaStepEnergy"
+            create_dataset(self.channel_begin_dataset_name, 'd')
+            create_dataset(self.channel_end_dataset_name, 'd')
+            create_dataset(self.step_energy_dataset_name, 'd')
 
-        create_dataset(self.channel_begin_dataset_name, 'd')
-        create_dataset(self.channel_end_dataset_name, 'd')
-        create_dataset(self.channel_center_dataset_name, 'd')
-        create_dataset(self.pass_energy_dataset_name, 'd')
-        create_dataset(self.step_energy_dataset_name, 'd')
-        create_dataset(self.step_time_dataset_name, 'd')
-        create_dataset(self.iterations_dataset_name, 'd')
-        create_dataset(self.slit_dataset_name, 'd')
+        if 'epass' in self.region:
+            self.pass_energy_dataset_name = path + "ScientaPassEnergy"
+            create_dataset(self.pass_energy_dataset_name, 'd')
+        if 'tstep' in self.region:
+            self.step_time_dataset_name = path + "ScientaStepTime"
+            create_dataset(self.step_time_dataset_name, 'd')
+        if 'iter' in self.region:
+            self.iterations_dataset_name = path + "ScientaIterations"
+            create_dataset(self.iterations_dataset_name, 'd')
+        if 'slit' in self.region:
+            self.slit_dataset_name = path + "ExitSlit"
+            create_dataset(self.slit_dataset_name, 'd')
         
     def setup(self):
-        print("spectrum.setup")
+        # print("spectrum.setup")
         print(self.region)
         
         if self.scan_index != get_exec_pars().index:
@@ -186,17 +189,15 @@ class SpectrumReader(ReadonlyRegisterBase, ReadonlyRegisterArray):
             pass
 
         try:
-            ExitSlit.move(self.region['slit'])
+            ExitSlit.write(self.region['slit'])
             append_dataset(self.slit_dataset_name, self.region['slit'])
         except KeyError:
             pass
-        print("done slit")
+            
         Scienta.update()
         
-        print("done spectrum.setup")
-        
     def read(self):
-        print("spectrum.read")
+        # print("spectrum.read")
         global current_region_index
         current_region_index = self.region_index
         self.setup()