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.
Sorry to hear you didn't manage to build this up! Tolerances of this thing are small so the printer must be well calibrated.
This definitely works, but make sure your printer is working properly! Try to re-print the screw part and scale it up little if that is the problem in your case.