I am looking to buy a new tig torch for chassis work. I have been using a CS310 for years, since I could be welding 1/16" SS one minute and 1/4" aluminum the next. I have always found it to cumbersome for doing chassis work but just put up with it. After working on a rollcage all day today I have had enough. I'm not sure if I should go for the smallest watercooled or will an aircooled be adequate?