It is a bugger getting them out; especially back in. Use a screwdriver to tap the bronze holder out. Use 2 screwdrivers to get it in and a lot of patience.
I made a TOOL out of a paint roller cover ( the kind you paint walls with ) it had a plastic tube base ,not paper. Wire brushed the nap off of it, ( damn that made a mess ) anyway measured the slots and cut them out to make a SOCKET type tool to push in and turn the ears on the ring. YES the idiot that designed this needs their *** KICKED:evil: