Simple panel for mounting buttons. I used the following items:
Fan controller:
https://www.amazon.com/gp/product/B07GP72BWV/
On/Off switches:
https://www.amazon.com/gp/product/B07T1JG6BD/
The default sizes for the two of the switches and one of the fan controller with 2 M4 screws and some 8mm diameter magnets. The switches are 12v switches but work fine on 24v. The fan I hooked up was a 24v fan.
The author marked this model as their own original creation.