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.
It DOES have a very high lead angle. I may print the nut out of PLA so it doesn't wear as fast, it will slip more. I had also considered dipping the nut in a tough, thin epoxy to "fill" the gaps between the threads. Until I build a threaded-propelled shuttle, I won't know how fast it wears. So far, it seems alright.