I have a UNO based gcode interpreter
be very keen to see how you've done yours
(you show me yours - I'll show you mine...!)
I tried to open the .sch file - I guess it isn't EAGLE compatible (well being DesignSpark I guess I'm not surprised!)
I've often wondered if it's better to go with a microstepping controller or just full step with an H bridge - what's your take on the difference?
thanks for sharing