Ok... Here is the deal. I with a variety of sheet thickness down to the limits of my machine I can get a passable weld in aluminum. By using heat sink metals at the ends I seem to be able to do ok there as well. Atleast with the thicker sheet (1/8 inch and up). I burned up all my thinner practice stuff for now before I started trying that. In practicality I was wondering if it might be best to make my long welds with the MIG (mostly for time savings) and then pick up a cheap TIG just to go back and do the last1/4" to 1/2" of each weld?
Bob La Londe