Built your own cooler huh? That's great! I'm going to be buying a new Tig system myself soon but I think I'll probably be staying with a 200DX I rarely need any more power than that and I will be able to stay with an air cooled torch. The PowerPro 256 is a great looking unit ... Jody's been giving it some good reviews on weldingtipsandtricks.com as well. Happy welding and stay safe.