1st off, I'll say, they are lying.
They are 2" tube with 3/16" wall, not .250" as per the web page.
SO, my RE threaded rod's (FOR 1.5" I.D.) were not tight in the tube. I Eyeballed them pretty well, tac'd them, check, then burned it. Serious Plug weld on the inside of the tube. May plug the...