diff --git a/site_ansto/instrument/util/config_edit.py b/site_ansto/instrument/util/config_edit.py
index a5ce4d7c..e500ff01 100755
--- a/site_ansto/instrument/util/config_edit.py
+++ b/site_ansto/instrument/util/config_edit.py
@@ -143,12 +143,12 @@ class InstConfigData:
 
   def opt_statechange(self, checkbox, new_state, udat=None):
     opt = checkbox.get_label()
-    dbg.msg(3, 'InstConfigData:opt_statechange({},{},{})'.format(opt, new_state, udat))
+    dbg.msg(3, 'InstConfigData:opt_statechange({0},{1},{2})'.format(opt, new_state, udat))
     self.opt_dict[opt]['enabled'] = new_state
 
   def imp_statechange(self, button, new_state, opt):
     selected_imp = button.get_label()
-    dbg.msg(self.msg_index, 'InstConfigData:imp_statechange({},{},{})'.format(selected_imp, new_state, opt))
+    dbg.msg(self.msg_index, 'InstConfigData:imp_statechange({0},{1},{2})'.format(selected_imp, new_state, opt))
     self.msg_index = (self.msg_index - 3) % 2 + 4
     if new_state == True:
       self.opt_dict[opt]['selected_imp'] = selected_imp
@@ -204,7 +204,7 @@ class OptionListWalker(CheckBoxListWalker):
     return
 
   def set_focus(self, pos):
-    dbg.msg(0, 'OptionListWalker:set_focus({}) -> emit focus_change'.format(pos))
+    dbg.msg(0, 'OptionListWalker:set_focus({0}) -> emit focus_change'.format(pos))
     urwid.emit_signal(self, 'focus_change', pos)
     return super(OptionListWalker, self).set_focus(pos)
 
@@ -254,9 +254,17 @@ class InstConfigManager:
       self.imp_lw_dict[opt] = RadioButtonListWalker(imp_items, on_state_change=self.imp_statechange, user_data=opt)
     
     self.options.sort()
+    # ffr Make a sacrificail listwalker imp_lw because copy.copy()
+    # doesn't work for urwid on the SL6 VMs
+    firstopt = self.options[0][0]
+    for opt,dict in cfdat.opt_dict.iteritems():
+      self.options.append((opt, dict['imptype']))
+      imp_items = []
+
+    imp_items.sort()
+    imp_lw = RadioButtonListWalker(imp_items, on_state_change=self.imp_statechange, user_data=firstopt)
     self.option_lw = OptionListWalker(cfdat.opt_dict, self.opt_statechange)
-    opt = self.options[0][0]
-    self.imp_lb = ImpListBox(copy.copy(self.imp_lw_dict[opt]))
+    self.imp_lb = ImpListBox(imp_lw)
     urwid.connect_signal(self.option_lw, 'focus_change', self.update_imp_lb)
 
     item_states = [(i,d['enabled']) for i,d in cf_dat.configuration_dict.iteritems()]
@@ -278,7 +286,7 @@ class InstConfigManager:
         self.option_lw.button_dict[opt].set_state(True)
         self.imp_lw_dict[opt].button_dict[imp].set_state(True)
 
-    dbg.msg(self.cf_msg_index, 'InstConfigManager:cf_statechange({},{},{}), cascade = {}'.format(b, new_state, udat, cascade))
+    dbg.msg(self.cf_msg_index, 'InstConfigManager:cf_statechange({0},{1},{2}), cascade = {3}'.format(b, new_state, udat, cascade))
     self.cf_msg_index = (self.cf_msg_index - 7) % 2 + 8
     return
 
@@ -293,7 +301,7 @@ class InstConfigManager:
   def update_imp_lb(self, pos):
     optname = self.options[pos][0]
     type = self.options[pos][1]
-    mstr = 'InstConfigManager:update_imp_lb({}) -> select {}'.format(pos, type)
+    mstr = 'InstConfigManager:update_imp_lb({0}) -> select {1}'.format(pos, type)
     dbg.msg(1, mstr)
     self.imp_lb.use_listwalker(self.imp_lw_dict[optname])
     return
@@ -354,7 +362,7 @@ class DEBUG:
     self.enabled = enabled
     if enabled:
       for msgID in self.msg_ids:
-        msgText = urwid.Text(u'Space for message {}'.format(msgID))
+        msgText = urwid.Text(u'Space for message {0}'.format(msgID))
         self.msgTextDict[msgID] = msgText
         self.msglist.append(urwid.AttrMap(msgText, 'body', 'focus'))