diff --git a/site_ansto/instrument/util/gen_sct.py b/site_ansto/instrument/util/gen_sct.py
index 97dbc0bb..44faf8d3 100755
--- a/site_ansto/instrument/util/gen_sct.py
+++ b/site_ansto/instrument/util/gen_sct.py
@@ -1310,7 +1310,7 @@ def put_checkstatus_function(MyDriver, func):
     txt += ['      set sp "[sct target]"']
     txt += ['      if {[hpropexists [sct] simulated] && [sct simulated] == "true"} {']
     txt += ['        set pv "${sp}"']
-    txt += ['        hset ${tc_root}/[sct driveable] ${sp}']
+    txt += ['        hupdateif ${tc_root}/[sct driveable] ${sp}']
     txt += ['      }']
     txt += ['        set pv "[hval ${tc_root}/[sct driveable]]"']
     txt += ['      }']
@@ -1396,7 +1396,7 @@ def put_pid_function(MyDriver, func):
 
 def put_var(MyDriver, MyGroup, MyVar):
     readable_or_writeable = False
-    txt = ['    # Start of var: ' + MyVar['name']]
+    txt = []
     postfix = []
     if MyGroup['name']:
         nodename = MyGroup['path'] + '/' + MyVar['name']
@@ -1553,10 +1553,9 @@ def put_group(MyDriver, MyGroup):
     dfr = []
     if MyGroup['name']:
         txt += ['']
-        txt += ['    # Start of named group: ' + MyGroup['path']]
         txt += ['    hfactory ${scobj_hpath}/%s plain spy none' % MyGroup['path']]
     else:
-        txt += ['    # Start of unnamed group']
+        pass
 
     for var in sorted(MyGroup['Vars']):
         txt += ['']
@@ -1569,13 +1568,11 @@ def put_group(MyDriver, MyGroup):
         if 'GroupProperty' in MyGroup:
             for key in sorted(MyGroup['GroupProperty']):
                 txt += ['    hsetprop ${scobj_hpath}/%s %s "%s"' % (MyGroup['path'], key, MyGroup['GroupProperty'][key])]
-        txt += ['    # End of named group: ' + MyGroup['path']]
     else:
         if 'GroupProperty' in MyGroup:
             txt += ['']
             for key in sorted(MyGroup['GroupProperty']):
                 txt += ['    hsetprop ${scobj_hpath} %s "%s"' % (key, MyGroup['GroupProperty'][key])]
-        txt += ['    # End of unnamed group']
 
     for grp in sorted(MyGroup['Groups']):
         txt += put_group(MyDriver, MyGroup['Groups'][grp])
@@ -2087,7 +2084,7 @@ def main():
     parser.add_argument("-m", "--move", help="generate move commands",
         action="store_true")
     parser.add_argument("--sct", help="where to put the sct in the filename",
-        choices=["before", "after"], default="after")
+        choices=["before", "after"], default="before")
     parser.add_argument("-v", "--verbose", help="verbose output",
         action="store_true")
     parser.add_argument("driver_source", help="driver source file", nargs="*")