Welding rig question

I use a Lincoln 180C, 220V MIG. It's not cheap, but neither are the welds it makes. I have a 30" extension cord that plugs into an electric dryer outlet so I can take it to friends houses when I need to. Done sheet metal and roll cage on our race car, and 3/8" on my cherry picker. No problem. I've used a cheaper Home Depot model flux core, and it got the job done, but lots of splatter. It was on thicker metal. Don't know how they perform on thin sheet.