The one we supply in the kits we had made for us by a local electronics company in the UK. They are just the opensource design fitted with good quality MOSFETs and connectors, the correct resistor values for the thermistor and accurate micro stepping and the 128K version of the Atmel. Unfortunately other companies that make them often skimp on one or more of these aspects, so beware.
[
www.hydraraptor.blogspot.com]
