Pro comp head failure

That’s why we buy it. I have mig, Tig, stick, and even an aluminum spool gun but I Dont take the required time to master any of them. Three welders that go unused sometimes for 12 months at a time. Pretty pathetic. Next years New Year’s resolution is going to be to weld something 1 hour a week. Ok maybe 30 minutes. Back in 2010 when I retired I was certified welding mig and stick up to one inch.
I found the 2 most important things for me concerning welding aluminum, is getting it CLEAN, and having patience with the tig. Calm and slow