I have the Z-axis ( a real prototype of wood/metal) done enough to implement into the X-Y axis - which is currently trying to be implemented motor driver wise - the mechanics will be fun (though i dont' have a degree in it) - the electronics have been challenging( though i _do_ have a degree in it !) ... maybe all the pain of getting through the coursework is a mental impediment on completing it ? too many lab time hours makes you not want to 'dig into' more lab time ? some kind of negative memory associated with the study/lab seems to make progress lackluster !!