Simple... Impossible...simply impossible or impossibly simple take your pick. Thanks for the ones who threw out some tangible numbers, that'll get in the ballpark,then tune for best results. Some think we're freakin' dumbass for asking for your advice from experience and others think it's a matter of National Security with a clause of absolutely no important information passed on. I finally just bought an inexpensive flux core, plugged it in, practiced a bit and fixed my exhaust to my satisfaction. The main thing that helped was the trial and error practice and small adjustments until I felt like I was controlling what was happening at the end of the mig gun as apposed to just melting wire and making blobs of it all. Yes it can be done, practice on scrap until comfortable. Clean and set up your desired joint,drop your shield,pull the trigger and give it your best. Don't give up on it because you'll get a successful weld. It took me more tries than I'll admit to, but I got it. Position changes was a obstacle and cramped up spaces too. Nothing you can't overcome, I promise you. Heck, the neighbors 5 and7 year old kids think what I'm doing with this old truck is the coolest thing in the world. I ain't gonna blow it with these two. Cutting stuff up and sticking back together better than before.....Hero status...makes one feel good....
