I'm pleased with this unit. I'm using it for body panel replacements, typically 16 & 18 gauge sheet metal. I also played around with 3/16" plate to test the penetration capabilities. With .025" wire I would say 3/16" is the thickest you could go with decent penetration. Thicker dia wire might achieve deeper penetration results.

I agree with the statement about the lower tank chain. It's too close to the bottom of the cart to be effective. I had a minor alignment problem with the top tray and back panel. The corner bends were line to line so I had to force the top tray into the back panel. Not a big issue, just annoying. I do not have an issue with the gas fitting in the back of the unit because I'm using a small tank. However I could see it becoming an issue with taller tanks. Fitting protrudes straight out from unit. An elbow would mitigate any interference with a tall tank.

Absolutely get yourself an auto darkening helmet. I love the one I got with the kit. A little flimsy but it works well for now.