These do not have RBI flood?
The FLI's have an RBI function to remove residual "burn in" between subs - I enable it all the time,and it only adds a few seconds to the exposure while it deals with it.
You can read about it here:
http://gxccd.com/art?id=418&lang=409
I thought the high-end AtiK's had the RBI flood feature? Have a look through the extended menu - enable it on install to access additional featureslike the window heater etc.