[Paul F]

Forget the Lincoln. It only does DC TIG, so no aluminum (unless that's ok with you). The combo systems are always a compromise. Don't do it. You'd be much better off buying a full-featured TIG or a MIG for much less.

TIG without heat control is not practical (and the welder probably doesn't work without it). It takes away a key feature of TIG. You need a footpedal or finger control or just stay with MIG.