@Gavan Hood attached are some pictures of the pedal I modded for the Kemppi tig using the 4 pin and 10 pin connectors. I chose to add a remote with 2 potentiometers to select the working range of the pedal if you dont want to do this simply remove R3 and R4, then connect R5 between +5V ref and Ground with the output going to pin H, it also has an extra arm/disarm switch so that I can avoid accidentally knocking the pedal and it sparking up. You need the added circuit to output 2V to select Tig mode - without this the set will not allow you to select "remote mode". I think my starting pedal was an R-Tech pedal - but it really shouldn't matter. Any question get back to me in this post.