I'm a newbie to this 110v MIG which I'm borrowing. I've done a bunch of buzz box welding in the past with good results, and a lot of oxy-acetlyene stuff as well... but I don't have a buzz box anymore and my gas stuff just isn't suited for what I'm doing. This MIG is a FirePower FP90, its rated to 90Amps as follows. 80 amps @ 15% Duty Cycle 17.5 volts on 120v single phase 60 hertz with a 20 amp draw 60 amps @ 20% Duty Cycle 21 volts on 120v single phase 60 hertz with a 15 amp draw My issue isn't with the duty cycle, I don't need to sustain a long bead but I have a hard time getting a clean puddle with it. I'm working on 1/4 steel which I taper first and realize I'm not going to get a single pass on this thing but I'm having a hard time getting any pass on it, even on thinner material. Either I'm setting the wire speed to nearly its slowest setting with the Min/Max switch set to Max(I know, cheezy) and working an area for a long time to get it hot enough to puddle (at which point I'm playing zig zag trying to get both sides to puddle together, or I'm upping the wire speed and not getting any penetration. Another thing which has been bothering me is the wire speed is erratic, I've set the tension internally at the pinch wheel and that seems ok, but the spool knob holding the spool on gets tighter with use, and if you loosen it, it unravels. It's no wonder they discontinued this model, anyway, back to the rest. I'm using .030 hobart flux cored wire fabsheild 21-b. I get a decent penetration on my .120 wall tubing but the erratic wire speed and poor puddling makes for a bad weld. A lot of splatter too but I think that was a result of my distance from the work, a closer distance from the tip has solved some of that. One last factor, I'm using a long extension cord. It doesn't get warm, but could this play a role in its poor performance. Last but not least, I'm looking to get into my own MIG but want to keep it under a grand. I'd prefer a 220 setup with a potential to upgrade to gas in the near future but don't need it now. Since most of what I'm playing with is 1/4 should I avoid a 110 model or has this little 90Amp just poisened my opinion of the 110v models?