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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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The fan duct in the picture is out of date, resulting in jamming problems with PLA and PETG.
I replaced the stl file with the new one supporting 30mm fans. The pictures shows the old one. Adopting fans with CFM > 4 allow a lower working temperature with ABS too and then less warping problem (I lowered the temperature of 10°C).