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.
Would you be willing to upload the "hollow" part of this file as an STL? Open SCAD is on the learning list, but not there yet. 123D online now supports STL imports, and I'd love to be able to use this to do some boolean operations on parts to coordinate with your pins.