So here's another PS minican rebuild, and all that involves:
1) Complete strip and clean
2) New end bell bushing, with the end bell drilled and the new bushing keyed to the plastic with hit-temp epoxy
3) New can bushing installed, epoxied-in place
4) All the hardware cleaned, flattened, and the interior clearanced for the wider com, reinstall
---then time for a new arm---
This time, I used some of the really skinny profile PS lams, like those used in the "Puppy Dog" arm I had lying around for some time now. These have a thin winding leg, a full crown and zero "hub" section back towards the shaft, with a tiny "triangle" functioning as a wire-stop. The triangle, unlike either a round of diagonal is a "hard stop"...you CAN NOT wind past the triangle, turns will not slightly "climb" up as they can with a "hub". The good news is that this design absolutely maximizes the available space for winding. The bad news is that you may have "too much space" for some winds, and you can't do some things you might want to do. The back end of the coil...closest to the com...pretty much must keep stepping-in as you finish each layer. On a six layer coil, the last turn on the top layer winds up pretty far away from the com and that presents the risk of your coil/pattern falling apart at the last minute = "no bueno"!
So I worked out a pattern for a 50/29 on these lams, stuck on a tag and did the deed. It should make for a pretty zippy mini. Will it work better or not as good as a more typical lam? Beats me!