Thank you, guys, I appreciate the wisdom. Sounds like the gas makes a better weld, and practise on scrap is a very smart idea.I looked up Miller and see Millermatic 140 - must be the next generation from the 135 - I'm leaning that way.Thanks for the warping tip-I'll take all the tips on how to weld floors and body panels I can get. I've been pouring through the posts in this section. Thanks again.