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 just printed the left and right brace, then a single crossbar and the crossbar is SUPER loose in the dovetail slots. Not sure that was intentional or not, but just FYI to anyone printing it, that's what I experienced. Needed to increase the width 106% to get it to fit without slop.
I used a Monoprice Maker Select (Wanhao Di3 v2 clone) and it prints a 20mm cube at (x/y/z) 20.01x19.99x20.01mm right now.