I'll also be very keen to follow your build.
Very nice MiG weld. I really should put some CO2 on my MiG welder, I've been lazily using flux-cored weld wire - good for outdoor work in windy conditions, but don't get very neat welds (doesn't help I tend to be welding old / dirty steel). If I want to do a decent job I reach for the TiG welder, but that is slower of course, and goes through my cylinder of argon I try to save for aluminum welding.
Weight is often a concern when building your own camper. In your case I don't see that being a problem given the nature of the truck you will be carrying this on.
Good luck,
Steve.
