I just installed both the lightning bow and Super Sabra pack also.
Before the lighting bow is in, if you only have the Super Sabra trigger pack, there is still loads of take-up that could be construed as creep. The final pull is nice and light, but the initial feeling is actually terrible.
If you run the OEM trigger pack and just install the trigger bow, the take up is very good and the trigger is much lighter. The final trigger pull is still very gritty and quite heavy.
After the Super Sabra pack AND lightning bow is installed, and as long as you adjusted the bow correctly upon installation, there should be NO creep what so ever. You should feel the initial take-up from the first stage of the trigger pack (which is actually adjustable), and after that the trigger should break cleanly. It's not as nice as my Remington 700 or Tikka m595, but it has no noticeable creep...especially not 2 or 3 movements.
Try charging the rifle, and wiggle the trigger bow back and forth. If you adjusted it right there shouldn't be any movement.
Also, Geisle says in some cases the aftermarket bow may require some fitting it keep it from rubbing in the trigger well. Mine went in perfectly without any issues.. But they say some may not. When you installed the bow, was it completely free to swing back and forth?
Good luck, and feel free to PM me with any questions...
-Josh