Note that I have not yet printed one of these. Likely best printed in ABS, I would think. I only have PLA on hand. Choose your own infil percentage to get the stiffness you want. It is 2mm thick, and aimed at hosting a relatively standard race quad vtx unit, such as a 5823 or ET200 style unit. The side holes are for cable ties or other strapping solution to keep it in place, or you might also be able to put some big shrink wrap around the vtx and the board, as long as you leave the corner holes open. The notch at the top of the central open area is for the glob of solder on these vtx's that grounds the little vtx module to the rest of the circuit board. That glob often sticks up a bit, and I didn't want to stress it, so I made the notch to accommodate it. This is a standard 36x36mm board for stacking with most quad controller boards.
Let me know if it works okay... happy to make mods as needed.
BTW, the one in the photos was a laser-cut prototype... not a 3d-print. I trust that's somewhat obvious, but then I don't know what that wood filament looks like when printed. :-)