Thanks for the info. Maybe I'll just bite the bullet and buy some 56% silver then. Also I liked your comment on losing the goggles, I've seen some recommendations on other forums to use didymium glasses. I've ordered a cheap pair to try them out.

I plan on trying to braze some dummy dropouts in the next couple days, and I do have some C-04 rod and Type B flux ready to go. The rest of my frame will be tig welded. I do have thin-walled tig welding experience so I'm less worried about that.