I'm making the U shaped stringer stand-off's. Now using 5/16" spacing.My question is has anybody used 2 part epoxy as a temp hold of parts[this case the 1/4" tube attached to the U portion of stand-off] for welding.I saw something similar on EAA Experimenter Video. I'm picking up the1/4" 035 tubing tomorrow. Should be interesting if that works. I have about30 of the U shaped parts ready to go. Mark