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 would be glad to provide you anything you need, unfortunatelly step file is not one of things I have. It was never designed i CAD in the first place. The "pseudo holes" were added to to allow supportless print.
Rape your base? What do you mean? They collide with something when mounted?