Originally Posted by
Hondo6
Not a frame builder or pro mechanic, so my opinion is likely not worth much. Maybe @
gugie could offer some advice - he's built and modified frames, and is by reputation
very good at it. He's a regular in the C&V forum but this might pique his interest.
All I can say is ditto to
this post and
this one. When I do framework I typically check for a squared off seat tube lug slot, then take a small round file to the bottom. The intersection of two straight lines makes a
stress raiser. Campagnolo Record and Nuovo Record crank design has a stress riser on the drive side arms in much the same fashion, the "upgrade" is to round off the sharp corner with a round file as well.