Did some practice beads.on an old scrap frame (Dawes MTB) and had a lot of cracks. Maybe only 2 beads out of 10 were uncracked. I messed about with settings but couldn't seem to shake it, which made me think it was the rusty inside :D
You don't need that to get decent welds. Buy some clean proper test tubing.
I started with 4130 plain guage. It is worth knocking out a bunch of t-joints imo
Did some practice beads.on an old scrap frame (Dawes MTB) and had a lot of cracks. Maybe only 2 beads out of 10 were uncracked. I messed about with settings but couldn't seem to shake it, which made me think it was the rusty inside :D
don't have the kit to backfill it