Hi Tom, Here is an older photo of the setup.
Unscrew the barb fitting where the clear line from the airgraver foot pedal connects and screw in a y fitting there. Them reconnect the clear line and also the line to the rotary disc pedal. I have those Y fittings and send them out with the disc foot pedals. The disc pedals are $69 and listed with the airgraver pedals
http://www.airgraver.com/Hand_Engrav...OOT%20CONTROLS
