That One Guy
Adventurer
Just to let you know... You can't weld that aluminum angle on there. Aluminum and steel don't work unless you have TIG, and even then you need an experienced welder to do it. Also, something I do to prevent thin sheet from warping while welding is to weld a little aand drip water on it and let it evaporate before welding again. More time consuming, but works great. Or you could just let it cool if you've got the time. Sweet idea for a camper trailer though, I like it a lot. Especially since it's a stepside.
EDIT: Also looks like you could turn your voltage up a bit.
EDIT: Also looks like you could turn your voltage up a bit.