Great progress. The Reprap software is running properly on my laptop, it is talking to the main board which is talking to the stepper controllers. All 3 axis are now moving although I have a problem with the Z axis. It only moves up, not down. I think that the belt is too tight so I will do some troubleshooting tomorrow. I have started to assemble the extruder and, since I have a week off now, I should be extruding plastic within a few days.