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.
The fan duct in the picture is out of date, resulting in jamming problems with PLA and PETG.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).