Thank you for getting this to me.
On a related note, my application uses my two duet extruders for other axes.
I don't actually need an extruder per se. However I do need to use the M571 to open and close a valve.
Do I need to attach a Duex5 so that I can define an extruder to reference? I currently do not have one attached, but I have one available.
I tried defining all 9 drives in my config.g [...M569 P5 S1], Mapping it to drive 5 [M584 E5] as well as setting up a Tools that use the extruder, but I get a tool definition error if I try to use an extruder other than D0 or D1 in my M563 command. [M563 P0 D2 S"Color 1" F0 ].