Who was the guy and contact information that rebuilt the coil rings?
Call Wally Szumowski 773-586-4485
RV Anderson does a super job. He is a frequent poster on this forum. You should be able to get his address.
Haven't seen RV's but Wally does an excellent job. RV's reputation is solid and I bet his are just as Dave says.
Wally has all kinds already done, so, you send him yours and he immediately sends you one back. I'm very happy with the one he did for my 15.
I never met the man but i have a Wally coil ring and when you run a [Stem Winder] a hot coil ring is very important!! About 4 or 5 notches advance turn the switch RIGHT/to MAG and pull the handle!!Scared,get a chebby or another off brand!Bud.
I have gotten rebuilt coil rings from both Wally and RV. Both guys do excellent work.
I have seen coil rings from both and they are equally fine. I think the deciding factor might be shipping cost to your location.