I have now completely sold out of both single- and dual-nozzle boards. All I have left is one single-nozzle board that failed testing and needs a component change.
I will make some more boards if I get enough orders (about 10). This time, I will make a board that can be populated for either single- or dual-nozzle, and is convertible from single to dual nozzle just by adding additional through-hole and large SMD components.
Please PM me if you want to be on the waiting list for one of these boards.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].