[mickmate]

Ant that sounds like a great set up. You'll have more and more fun with that. Remember an Amp per thou (or 20 Amps per .5mm for you) will get you pretty close. The thumb control set ups I've seen but haven't used. One of me mates swears by his. Make sure you concentrate most of the heat towards the thicker metal like the flange rather than the tube with exhausts. I really enjoy TIG, with enough practice I'll get good at it one of these days. Cheers mate.