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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What's going wrong with them? Do you have a pix? I originally used Makerbot Desktop and they seem to do OK with Simplify 3D. I could make them a little thicker if they're too thin. I guess it's not a drooping problem if you tried the no-supports one and added your own supports.