How thick of alluminum can this unit handle with the spool gun? also can it use the 200 amp binzel gun for the i-mig 205p? I want a little welder to keep in the tuck when I just have to fix litttle things at the harbor on boats and the lighter the better. Thanks even though my tig is dead I have to feel it was just a bad one. I am putting some trust in green and about to buy 3 more welders for our mobile unit. hopefully all will go smooth.