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.
Printed one, and it came out great.
For those having trouble, the trick to separating the parts is to print at the lowest temperature you can (190 for me, using PLA), then use a small slot-head screwdriver, pressed into the circles around each 'bearing' while angled down and tilted towards the center of each 'bearing' at a 45 degree angle, and to push in less than half way. Do that a few times around, on both sides, and the parts (for me) popped loose pretty easily. Then lube with DW40, and the 'bearings' spin surprisingly well!
Trying to separate by hand, or using a knife blade, didn't work as well - it cut into the plastic instead of pressing the parts apart.