I received my new glasses today, and wow what a difference. I just did my first practice brass braze on a dummy dropout and 1/2" x 0.028" (~0.7mm) chromoly tubing from spruce aircraft. I'm overall pretty happy with the results for a first go. I took the mill scale off the parts with 320 grit sand paper (including inside the tube) and cleaned with acetone. I used the Type B flux, and the C-04 rod. I did the braze with a 0.037" tip (~Victor #1), with a much gentler sounding flame than what I tried the silver brazing with LOL.

I think I read on velocipedesalon to try and feed ~1/2 a rod into the joint. This was probably 2/3 of a rod of 1/16", although I think the slot for the dropout was a bit deeper than necessary. Question for you guys: Is there anything that helps with reducing bubbles? Maybe I fed the rod in too fast? I'm sure there are a million variables but if you had to guess, what would you recommend?