OpenSCAD, Customizable PCB housing

Housing that can be customized to fit my various non-standard PCB sizes.
Edit the OpenSCAD file:
- Set generate_upper = 1 to generate upper box half
- Set generate_lower = 1 to generate lower box half
Or set both to generate both parts side by side

Define the size of your PCB including top component height : pcb = [45,68,15];
and the thickness of the bare pcb (for claming): pcb_height = 2;

Wall thickness can be adjusted with
- owt = 3; // outer wall thickness
- iwt = 2; // inner wall thickness

You can add as many drills in the side wall as you like by filling theses vectors:

- cable_drills = 3; // radius (!) of the drills
- y_drills_bot = [-22.25,30]; // positions list on the bottom
- y_drills_top = []; // positions list on the top
- x_drills_left = []; // positions list on the left side
- x_drills_right = []; // positions list on the right side
The position is around the center, so e.g. -10 is left, 10mm of the center

The lower box holds the pcb, to c