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.
From the skeinforge output of my last build:
M8 Extruder Block 3 - 30.4 cc
M8 Extruder Idler Block 2 - 3.7 cc
39 tooth gear - 10.1 cc
11 tooth gear - 1.3 cc
Those are calculated extruded volumes with my particular skeinforge settings, but I build them fairly dense. Solid densities will be at least twice as much or so, but you should be able to figure that out from the STL's.