This remix of Oneiro's rack mount for a Pi 5 is designed for threaded inserts (M2.5). This allows mounting of a Pi (and HAT). I used these inserts from CNC Kitchen: [https://cnckitchen.store/products/gewindeeinsatz-threaded-insert-m2-5-standard-100-stk-pcs](https://cnckitchen.store/products/gewindeeinsatz-threaded-insert-m2-5-standard-100-stk-pcs)

I included the STL, OBJ and F3D files.

You can use the D, L and W parameters in the F3D file to adapt this design for M3 inserts.