Steve----what is the wall thickness of the tubing your using??????????Sorry to create controversy??

I was reading some of your posts about liking the 60s machinery-------so do I, except my Pratt & Whitney lathe is supposedly off an early 40s boat----I've got 3 bridgeport mills plus an Index mill, 20 inch bandsaw(new in 1970) 2 Lincoln tig(one new one old) an Linde heli arc that was owned by a company that built stuff for the space program(some of the stuff they left on moon was welded with this machine)