I don't know if you can see from the pictures but the inside of the bore is actually stepped. It's narrower up by the exit and deeper where the pin is. I would only drill out the raised section and put the bushing in there. The reason for this is the amount of play between this bore and the shaft was great enough to put some pretty big scoring marks on the through spindle. I've polished those out but would like to avoid anymore wear.JerryVan wrote: Sun Jul 28, 2024 7:50 am opening up the hole to accommodate a brass sleeve will cut away the back side of the stepped drive pin, allowing it to fall out.
I've contacted a local instrument repair shop. I've sent instruments to them for 20 years. Not sure why this would be any different than repairing a euphonium or horn in F! If they think adding the bushing is beyond them (which I can't believe it would be) I'll skip that part, but if I have a chance to improve this motor after what the poor thing has gone through I'll do my best.
Thanks!