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 am having the HARDEST time printing the tray (Tray.stl not TrayPlain.stl). By banisters keep breaking while printing. What settings are you using to print this: layer height, speed, etc.?