If you really want to get tricky, check out how Miller switches the argon on their lunchbox welder.
Originally Posted by Tanh
I might have to do the same as another mod. But I've been using valve torches for years and don't really mind them. With a valve you have complete on the fly control of pre flow and post flow. I do like the argon through the DINSE plug, though. With the new EXT in the wings, I'm waiting before I buy a TIG rig, so I can play around with this little box in the mean time.
Long arc, short arc, heliarc and in-the-dark!