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.
I find that the 40mm fan fits, but only by 1 screw in the upper-left (drill a small spot so the screw can bite). This also hangs off the bottom as well.
Didn't impede the radial blower at all, but it's not ideal for a secure mount.