This is a way to rack mount my guitar effects in a 19" rack. It has three slots for a “box”.
You will need m4 nuts and screws, and m4 heat inserts for the front of the panel. The nuts are somewhat of a pressfit.
I just use a daisy chain for power.
I have printed it in PETG. No supports are needed. It will fit small printers, this is printed on a bambulabs A1 mini.
The author marked this model as their own original creation.