Thanks for the thoughts folks. Well, whether it is actually red loctite, or a red colored "anti-vibration" coating (errrr...kind of functionally like loctite!), but to the folks that say they've never heard of it..well, most late model smiths have it. I've seen many. There's pics on the internets too!

686 yoke screw - Google Search

Anyway, thanks again. I like the wood dowel idea, and may give it a try with the frame as cold as I can get it. If that don't work, it's off to the factory. What a pain in the ***.