update: robin is working on my cue as we speak. he's simply replacing the insert with a 5/16 x 18 pin. i happen to have two extra meucci shafts which i will use on the dufferin butt. it's a cheap and easy fix and will get my cue back in action!
Congrats! You have now added new life to your old cue, and opened up your options, shaft-wise as well.
Lisa