MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
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Hi pefozzy. Thanks for your feedback regarding the missing extruder mount geometry (filament tunnel). I tried slicing the base via RepetierHost/Slic3r, and Repetier keeps telling me, that the object was non-manifold. I inspected this issue with MeshLab and changed my OpenScad file accordingly. Please download the new files (scad/stl) and give them a try. I'm looking forward to hearing from you.