I took a ride up to WPB and met GTBeharty today, he bought a harbor freight TIG welder and we exchanged some emails about it. At first glance I was pretty skeptical as to how this shoebox size thing could weld. Since I spent most of my 25 years weldingwith Millers and a few buzz boxes I really did not expect to much. We got it set up and to my surprise this little box puts out a nice steady clean arc. I sold my shop about 10 years ago and haven't welded since but it only took a few minutes to get the feel of it again. We didn't have much scrap to work with but we laid some beads on an ols peice of steel and welded an old saw blade together. The welder has plenty of power for small items and sheet metal, you couls do a pretty good job up to 3/16" with 100% penetration.
The only draw back to this welder is the lack of HF, which means you have to scratch start it, and it doesnt have a flow meter to regulate the gas flow. However since you won't be using it to build bridges or nuclear submarines it is a moot point!
If you are thinking about buying a small welder for gun work this is an ideal tool, much better than a MIG welder.