I was just thinking that a picture is worth a thosand words here. ss joint? pin?.....Etc....
Some Ideas I have used in the past, add a larger pin-add a ss joint add a ss shaft ring to match ss joint, weightbolt in back to balance new joint.change to a leather wrap. I have to laugh about a "naturaly balanced cue" in my opinion its a man made tool, its either balanced well or its not! who cares if was pretty close without any fine tuning or was carefully done on purpose? it just needs to end up right!
I used to take care of a large number of leage players wishes and wants and these were things I had my cue maker do to help personalise there cues. he even had to put a metal screw in place of a wood tennon to get a particular muecci to have any forward balance and stay in the 20-21 oz range as requested by cuzzie once.