If the new clips install with a simple squeeze and twist of the pliers, why not just remove them? And insert some kind of centering sleeve.
On 12g's rockets topic. I recently got a Micro CA Lever stock for my BM Sniper. So I throw a 12ie in there, air it up.. Sweet that was very fast and easy... pump out a few shots, don't want to shoot the whole 12ie since I live in a condo and I'm sure my fellow tiny box in the sky livers around me ( I hate living in an app/condo.. I miss grass
) would love me. I decide to check out how quick it is to eject the spent 12ie.. Well.... VERY quickly when its only 5 shots old haha. Good thing it hit my laundry basket and not my wall of markers.