Thought I'd give a try at how a solid wood version would come out. Here is the result of about 45 minutes prototyping with a piece of 3/8" Cherry I had lying around.
A couple notes: The 5/64" (.078", 1.98mm) bit has some tendency to wander, as can be seen in the holes. I also goofed the measurement so these are 11/16" instead of 9/16" wide. I didn't notice that until I was nearly done, and figured that since they weren't actually going to be used it didn't matter.
I also didn't add the slot for the PCB, mostly because I wasn't sure of the size, and I didn't have the appropriate cutter lying close by. I have a couple thoughts on that.
Tor