Originally Posted by rootboy

You know, I figured I'd cross the "anvil" bridge when I came to it but you're absolutely right. We need something to back up the pin. I guess I figured I'd just find something, but a dedicate back anvil with the proper shape would be a boon. OK man, I'm going to make something when I work on your punch today. Nothing fancy, maybe another short length of the steel rod, with same concave profile milled into the end and, perhaps set into a hole in a wood block? Don't know. I'm going to have to take a NR, lay it on its side, and take a look at what might be ideal, or, at least work. BTW, the most challenging aspect of building this punch is the concave face. On Jeff's, my first one, I tried with a small Dremel ball cutter and then hand shaped it with the Dremel. On the second one, I found a ball end milling cutter in my stuff but it's a hair too large. By the time I finish up yours, I hope to have this dialed in !

Say Kurt, I presume you've taken these derailleurs apart before. Both alloy pin and later, steel rivet models? I'm curious, in your experience, when an old, well-used NR gets a bot loose and sloppy, what is it that wears? The aluminum in the top and bottom pivot bodies? The holes in the bodies that accept the pins? I'm just wondering, for instance, if one has to replace body parts when doing an overhaul. I don't have any of those other than one NOS face plate. Maybe get donor parts from another derailleur, etc.

OK

down to the dungeon. Thanks again Kurt

Scott