Rigidbot Easy Print Cooling Fan Mount for Single Extruder

I wanted to design a quick and easy fan mount that could be printed on the stock ridigbot without support material. This is designed to work with a 40mm fan, and 15mm-18mm m3-0.5 screws, although alternate fasteners will work.
Please let me know of issues or improvements with this build, I've made some modifications since the last version (which is the one I printed) and am hoping they don't cause any issues.
This model is inspired by and based on jwolee's also excellent rigidbot fan mount.