Doesn't look like the manual for the 160STH is up on the website yet. I remember EchoSixMike mentioning he liked the post flow from his unit. From what I've been reading, it looks like the gas flow on the 140 is pretty much controlled from the manual gas valve on the TIG torch as the unit doesn't have its own gas solenoid. To stop welding, you need to pull away and break the arc. If you don't have a foot pedal for the 160STH, how do you stop welding and take advantage of the post flow and gas solenoid stopping the gas?