What issues did you have with that spool gun?
So two issues:
1. I was using spools of Alcotec wire and when placing the spool into the spool gun it was such a tight fit in the spool that it had to be forced onto the "spindle." It's tension can be adjusted by tightening mashing a rubber spacer down with a thumbscrew, but it was so tight without tightening that the rubber spacer had to be forced into the spool. When I first started the wire was not feeding very well or at all because of the tight fit. I ended up sanding some rubber off and then lubing it with Vaseline. If I let the spool sit for a few days in the gun, it was so tight that I could hardly get it out to relube it.
Also because of this I would barely screw the thumbscrew in, just enough to keep the cover on, so on many occasions the screw would loosen, the cover fall out and then the spool would fall out (I know... considering how tight a fit it is - I guess as wire was fed out it would the spool would "unthread" itself) making a rat's nest of wire.
Maybe it was just the brand of wire, that all I ordered though and it's what the shops in town sell.
2. There must be a bad connection at the trigger or where the wires come into the gun. It will work fine 99% of the time but then - pull the trigger and nothing. There didn't seem to be any rhyme or reason or even a sweet spot to get the wire. Sometimes I would just have to walk away for the night and it would magically work the next day. Frustrating!
My plan is to buy a conversion box and a Miller 30A gun if I ever take on another boat project with this welder, but until then I'll make due.