Further details will be announced on the Duet3D forum. Availability will be limited initially, but we'll manufacture a larger batch in due course. The mounting holes are compatible with Hemera. We've gone with screw terminals for the heater, fan and thermistor connectors to make DIY wiring easier. The motor connector is 4-pin JST PH. Price has been provisionally set at £39.50 each + tax + shipping, but we plan to offer a discount for those ordering 4. To use these Tool Boards, you will need a Duet 3 main board, and either our Tool Distribution Board (also to be announced shortly) or your own wiring scheme for distributing power (preferably fused) and CAN bus.