Dave Severson is right on with this. That is the right way to do it. I'd use Dura-glass or some other glass fiber filler for the finish work like he said. My 29 is fiberglas and that type of filler is really strong. Just remember to get it metal finished as good as you can to minimize the fillers. I like the idea of pictures, you can never take to many, take them of each step, the bonding, the welding, the filler, etc. It will speak volumes to the quality of the build you are doing. Good luck and keep us posted on the outcome.