MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Very Nice design! I'm working on my own version of a fully printable printer as well. I think you are definately on the right track with your design though you may be running into the problem of overcomplicating it...remember, the simpler and more elegant the solution, typicaly the less things there are to go wrong.