I will be adding the williams wide body kit to my model-4-1200, using the Tig Spot weld kit, by Eastwood, to keep the heat down. But, I need to know how thick the side tubes are on the kitfox, so I can set my DC current to the right level, and get a good spot weld. Anyone know the wall thickness, as shown attached here?

http://www.sonoragraphics.com/willia.../widebody.html

Thanks in advance
Roger