I've got a buddy that ran into a problem similar to yours: older Bobcat 225 was CC only and he has a Hobart (OLD!!! Hobart) spool gun and contactor box. He somehow took the contactor box apart (looks sorta like the SGA100) and bypassed the contactor switch and worked a always-hot connection into the deal. Now, whenever his MM210/SG3035 rig is out, he hooks the Hobart SG directly to the + post on his BC225 and all works well.....only thing being is that the wire is ALWAYS hot as long as the EDW is cranked and the contactor box is plugged in.

He knows way more about electricity than I do so I would never attempt it, but I've thought about buying a 3035 and SGA100 and asking him to "rig" mine the same way with my Hobart Champion 10,000.

Not that it matters anymore for you...