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.

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I tried vertically and they were ok, just a little bit of sag. I just modified the model to add a bit more support for the next print, should be perfect then.

It looks like they will not be so strong printed flat, the layers will not be in compression with the top M5 bolts into the frame.