A Waco 2050-16 is .080 and all welded. I do note that the welded Trackers seem to all have .100 skins now, but in the past they had thinner hulls. I recently rebuilt the collapsed bow of an older welded Tracker (a 16 footer rater for 60hp) that had .080 skin. Its certainly do able, but I can't believe they are doing it by welding a couple inches, and walking away for several minutes to allow it to cool before coming back and welding the next couple inches. Nor are the welds pretty enough to indicate they were robot welded. Even on 0.100 I can't run continuous beads very far. If everything is just perfect you can get maybe 6-8 inches before its to overheats and drops out. I am looking for something better.

I was told that a pulse MIG was the way to do this, but it sounds like from the way this conversation has been diverted that an Everlast pulse MIG can't do it.

(Actually to be fair Tracker is probably robot welding on their newest boats. They have gotten so big compare to other aluminum boat manufactures that it makes sense for them.)