Yeah, sarcasm is usually fun, but I try to keep it at bay because I usually feel bad later- especially with no practical way of searching back posts any more.
Pista, I`d say that if MIG is what you have available, you may as well get some cheap materials and give it a shot. Hopefully you`ll glean something ot of that thread, even if it`s mostly links to other sites. I know it doesn`t specifically give the info you were asking about, but as you`ve undoubtedly noticed, there just isn`t a whole lot of MIGging going on in the steel bike world, so some imagination, experimenting, and guesswork will be needed.