Tape That Oil Priming Bit!

[alice@domain.elided]

JohnS et al,
I would wrap some sticky tape around the joint of anything I stick 
into the engine ...paranoid perhaps ... cheap insurance definately.
There is at least the risk of popping off the bit as you extract it 
past an internal ledge or somesuch ...and the tape will ease it past.
Mark
PS.  Of course, one could always epoxy the bit to the extension!