I printed this in blue PETG for a homebrew Kossel XL and mounted it to the lower frame. It works fine this way, although when it's angled back, the print head can bump into the case on very large parts. Angling it forward moves it out of harm's way.
I printed it on a Robo 3D R1+, which has a build area that's barely large enough to handle this Thing. Unfortunately, this resulted in some lifting at one corner of both the front and back pieces, since the Robo's print bed, although officially heated, isn't heated to its edges, and the temperature drops off quickly there. I may reprint the front part on the new printer in hopes of getting a better print, since my new printer's bed has a heating element that covers the whole print area.