I designed a spoilerboard setup for my CNC machine. This system is designed around a spoilerboard that has a 10mm doghole grid, spaced 2 inches on center. Best used with M4 screws and bolts, a drop of CA glue to keep the bolts strongly in place. M4 14 screws used in the pegs that go into the dogholes, designed to expand and grip tightly when the screw is tightened down.

I printed mine with 4 walls, 4 top and bottom layers, and 50% gyroid infill, you might be able to use less infill, I tend to overkill when I am printing functional parts like this.