Wire Feeder

[mekanik]

not to sure about this one, so never made a comment earlier. I cant see how its going to be better than manualy feeding the rod. In a MIG set the current is comming down the wire and flashes off to droplets of material. also i do believe the power supply is different(could be wrong here).
Doddy its easy enough on my setup and i am no expert but first off every thing has to be spotlestly clean, once you have the Amps dialed in you get your pool and dip the rod into your Argon shield to heat the wire and then as you move nearer to the arc touch it on your work piece
Ther are some goods videos on youtube .
Regards
Mike

[Muzzer]

.....i do believe the power supply is different(could be wrong here).

Yes, TIG and stick sources are generally constant current (CC), whereas MIG / MAG is constant voltage (CV). Your plan may work to some extent but I expect you may struggle to maintain a stable arc. MIG / MAG welders are pretty cheap, so you may be better just buying a pukka machine for that. A logical next step for your TIG equipment might be an AC source so that you can weld aluminium.