is torch watercooled? how thin and how thick can it weld aluminum and sheetmetal? How much heatsoak does the plasma put out? I mean how clean are cuts in the sheetmetal? I bought for a killer deal of $30 but shipping was so expensive i cant comment. I take very good care of my equipment that the matco tools guy cant believe my stuff. Matco plasma stuff is by thermaldyne i think which has lasted me over 10 years, not knocking everlast because this stucc looks to perform top notch. We shall see. I build custom superchargers and musclecars. This unit does it all and i might get another. I seen a rumor stating it was a 250EX with a 60 amp cutter.