I can only think of two. And they are a bit advance. However, I really wish I had some formal education in welding and fabrication. I went to a vocational technical school for a while in high school and took a high performance engine building, machining, balancing, blue printing course for a few years. It was really cool, but little did I know the guys that took the welding/fabricating course were getting something much more practical. I know its not dealing with the meat and potatoes of "offroading", but think about how much more you could do to your build process, make it your own, save money, etc. Man I wish I could weld!