Any welders on the board?

Alot of the time, what I do when welding sheet metal, is I leave the power a little to high and I just pull the trigger and let off like your shooting a gun, I started doing this when I ran into problems with blowing holes in sheet metal. Just remember you dont have to fill the hole with one pull of the trigger.
It does sound like your getting too much wire when your pulling the trigger and can't find a happy medium. This might be because your using a thicker wire. I will just assume you are useing gas with your welder, Not just a flux core wire. If this is true I would try useing .023 wire. With this thickness I find it easier to turn everything down so I can find the "happy medium". You can also run the thinner wire through your welder with out having to buy new tips, It's not that detrimental anyway. You will find out that the wire won't load up on you if you try it. And it won't blow through as easy if you have too much juice. Good luck and I hope what I wrote makes sence. Josh