60mm fan mount for Raspberry Pi 4 & 5 Mini Server Rack Case

I built one of the Mini Server Racks from the link below and wanted to add a fan to help keep the processors cool.  

https://www.printables.com/model/759993-raspberry-pi-4-5-mini-server-rack-case

I was only using three of the slots and had a 60mm fan on hand so I used that.  In the rack I'm using three Raspberry PI4s with heat sinks on the processors. With the fan the temperatures dropped from around 85C to around 55C.

To mount the fan to the mount I used these M3 inserts:

https://www.mcmaster.com/94180A331/