78buckshot,
You can see from picture that the C50 I have has them on the back of the drum--they look to have never been changed. I have not pulled them yet, but all the others were in poor shape and nonreusable--mainly due to the sludge on the inside, but also because I had maybe one brass fitting that actually came off with normal force using a flare wrench, the rest required vice grips, cheater bars, brute force, and cussing.
Wrenchbender,
Yes am using the copper nickel alloy. They problem is it is soft and without a small radius die/bender to support sides wants to collapse or kink during bend.
