The four M3x10s I used slightly protrude from the bottom by about 2.5mm. I think M3x6 would be ideal.
I went with the Orange Pi 5 based on it being the premium option suggested here:
https://3dpandme.com/2022/08/22/pi-alternatives-for-klipper/
Compatible with the DIN clip here:
https://github.com/VoronDesign/Voron-0/blob/Voron0.2r1/STLs/Electronics/PCB_DIN_Clip_x2.stl
OnShape Source:
https://cad.onshape.com/documents/12b96a6681fe266705402cae/w/67c837cbe103bb4173e0fdcd/e/d95a63e1bee6d34cfc6badfb?renderMode=0&uiState=649d596ca95d19432ca957b0
The author remixed this model.