Thanks for your concern. Although I'd love to try to replace it on my own I know that would be smart especially on a 40 year old cue with no experience or tools to do it. Well here's my issue, I've called the Adam co. and they said they changed materials so often back then that you could have two of the exact cue with two different ferrule materials. Second problem is when I called the local billiard store the guy didn't even know what type of meterial they were using, I don't think he was the actual repair guy but its still kinda scary. I know he can do the work because I've seen it but i would like to know what exactly is going on my cue. I was thinking about buying my own ferrule and having them install it. Lastly thanks for the info about capped ferrules having a thinner tenon, my Adam is capped, I wonder if it was originally like that or if who ever installed the super cheap existing ferrule turned the tenon down. Either way thanks a bunch. I would still like everyone's opinions though, I find them interesting.