Don, I have a Millermatic 135. It will weld anything from 0.8-4.8mm) mild steel. I have used it on metals once size thicker than 1/8 and it worked fine. It is only 115 v too so no need for the different outlets and it's nice and light to carry around on the cart. Another good one is the one that's a step up from that which is the Millermatic 175. I have used lincoln electric welders before and prefer a Miller over a Lincoln anyday. Now that is for MIG. For TIG you can go with something small for a hobbyist or whatever and get a Miller Econotig or Maxstar 200 Series. They offer two different models on the Maxstar 200, a SD which is just a bisic one or a DX which is a bit better and pulses on and off. The Maxstar is pretty expensive, I don't remember the price on it but I think the gun and everything you have to buy seperate. Miller has more high end TIG welders as well like the Syncrowave Series so you can check those out as well, I have not used them yet but hear that they are very good and that is what I wan't next. I hope this helped a bit, for once I am helping instead of asking the questions, lol.