On my third 300 bottle of Industrial grade
Helium. Aside from some really shabby castings, that seem to require AC, I no longer need to brush & fuss over this work, Heli-Arc has provided me with the edge to build up a modest level of skill, that I guess can only come from repeated going thru the motions, every little detail, torch angle, how aggressively to, and when to add filler ...