I find my Turbo 130 difficult to set the speed on - it seems to double with a twitch of the knob.
I've got an auto one. Still can't really see where the join is, though.
I'm using an Argon/CO2 mix.
Can see my face in it.
I can get a perfect weld in the middle of a sheet. Butt welds spatter or burn. I've got anti-spatter spray. Or I end up with half a girder on the join. I'm not happy...