Hi guys, Randy if I can I will throw my 2 cents in on this, I have dealt with the mainspring not being strong enough but I also have dealt with like you said, a cam and pin or leaver binding thru the lifting period, what I am training myself to do is turn the minute hand (somehow) thru all the chime sequence, watching for anything that might be out of time or just not right. when you said that you could nudge it past the hour and it would run thru the next hour then my guess would be that a cam is binding with a pin or “lever” if that’s what it is called. (do you hear anything when you do that????) sometimes it can be one or two teeth away from setting up properly and binding on the cam before getting out of the way. Hey, pictures are always nice and if you still have issues they would help us. if you do take pics then try to get the rack and snail mechanism at the point where you are having it stop. keep on keepin on Randy. Please tell Bob and Paul to behave themselves.
P.s. my computer is in the shop and I am having Bobs forum withdraws 🙄 , had to fight my wife for some time on hers. She won of coarse but I was able to negotiate a couple a minutes. see yall when I get my energy back for another round. 
William
