Hello there,
I have had my 200DX for almost three years now and have mostly welded thin stuff with it. The past few months I have been welding 22 gauge I honestly do not use the foot pedal solely because all the thicknesses are about the same so I just set it to low amps and go like 18 to 22 amps. I love the welder I am even going to buy one of their MIG welding machines this Friday to speed up production in some areas of my project. Current things on the project involve welding in new body panels and structure.
I have also done a stainless turbo manifold for a friend and have to say the pulse was really nice to have for that. I have also played with the pulse on steel and I may not be doing it right but I felt it was not as noticeable as it was on the stainless.
I have used the stick feature a many times and had no problems with that either.
I am not certain if they have a new torch with the current control on the handle but I think that would be more useful and easier for me over the pedal.
About arc stability, the other day I went to see how a Lincoln MIG worked to test it and see if I would like a MIG. The guy also had a Hobart transformer TIG and he did a quick demo for me. I have to say from watching alone the arc seemed to jump around all over the place over to the other edge and things like that, I was shocked as I have never seem my arc wander with clean tungsten. When he brought it close to the corner there was another protrusion near by and the arc jump right over to it, whereas with the Everlast the arc always seems straight and true.
I also just switched to lanthalated over thoriated, I have to say the thoriated was much more forgiving but I almost feel like the lanthalated welds smoother. By forgiving I mean you could dip and contaminate the thoriated quite a bit and it keeps on going like nothing happened, staying stable and everything, but as soon as the lanthalated gets dirty that arc is all over the place.
Hope this helps.