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 am printing this in ABS. Either my printer produces slightly small printouts, or the clearances for the 3mm nuts is very tight, as I found that the RTL Fasteners nuts I'm using are just a little too big for them (in thinkness, and width). You might want to resize those holes up by .5mm or so to add some safety margin for hardware variances. I'm working around this issue in the existing prints by using m2.5 hardware nuts and bolts instead.