Umm that was constructive criticism. I have given pros and cons of both gases and bottle sizes. Not sure how much more constructive I can get than that. I welded the cage in my old wheeler with a 110 machine and CO2. 1 5/8x.134" from Chris Alston chassis works. Rolled it 2 3/4 times down the side of a mountain and not a single weld failed or even stressed enough to flake the paint off.