Summary

Customizable box template for PCB. Made in Fusion 360.
I made this project for XPJ-02C 12v power supply board.

Open .f3d file in fusion 360. Go to Modify -> Change Parameters -> Favorities.
Enter your pcb sizes, holes position. Setup empty room for additional components. See settings pictures for more details.
Add holes for wires, plugs, and everything else right in Fusion 360.
Look in .stl files and green box pictures, for example.