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.
Thanks a lot for reporting this problem. Indeed there was a sub millimeter gap between the handle and the base. I fixed the issue by extending the handle by several microns to align with the flat surface and reposted the main part as version 12. I am 30 minutes into the print and everything seems to be working fine. Let me know if this works for you if you ever print it again.