Nol: Walt isn't "jabbing" at you, he's just stating a few facts about the use of R290, especially those who sell units charged with it. (And plenty do !)

While you state that it's not illegal to modify your own tools, I'm pretty sure that Walt is correct about it being illegal to modify a torch.

Regardless, this is overshadowing mytekcontrols's awesome work. (I should really find a new word instead of saying awesome all the time.)