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.
I built a couple of the units, they look like they will work. What design changes did you make? I also made a version of the unit at 3.2 inch diameter, (about 81.3 mm) for a fellow rocket guy. I am attaching the STL and SW file. Sorry, it is in SW18.