Ken Charlson Fixie Project

But that's with me doing all the fit before and finish after welding
What difference would brazing have made to the frame ??

This is AFAIK;

Brazing is stronger, especially on thin walled steel frame that have already been heat affected, unless you have gas-piped, plain gauge, heavy tubing, welding is generally not recommended.

Would be helpful if other whom know a bit more into this comment on it.