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'm not sure what is happening with the model. I built it in TinkerCad, cut it in half using NetFabb and have successfully printed it on an MBot clone using Makerware software. The model is available at www.tinkercad.com as well if you want to go to the original and export it as a different format or re-work it. I believe you need to sign up though to be able to search the site. There are actually 2 on that site. Mine is the one found under "multi pass" 2 words.