I have a small gunsmithing business and am looking for a decent tig welder. Anyone have any experience with the Thermal Arc 161stl or 201TS. Only difference I see between the the 2 are the amps and HF start on the 201TS. I have very limited tig experience other than a few classes at the local comm. college a few years back. but i look forward to learning. Should I be looking for a welder with pulse settings for thinner material (maxstar 150)? Any input would be helpful.