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 think the flag can be safely made of PLA. My current one is made of ABS (still the same flag, servo and sensor from the very first prototype!). The body and cover both ABS and PETG are ok.