Before adding any components to the control panel, I used it as a template to drill holes in the clear polycarbonate sheet. I took the same approach as I did with the plexiglass, removing the pilot bit from the hole saw.
I also put a piece of scrap wood under the polycarbonate to help prevent cracking.
Once the drilling was done, I started putting nuts in all the hexagonal holes. I found that the easiest way to get them in was to tap them in with a hammer.
Next, I added the standoffs for the large circuit board.
I made the control panel 6mm thick, because that is the length of the threaded portion of the standoffs. But when I put one of the standoffs in, it protruded a little through the other side. A small washer under each standoff fixed this problem.
Next, I installed the circuit board.
With the board installed, I can start soldering in the LCDs. I will have to remove the circuit board again to solder the wires that will attach to the relay bank, as well as the wires for the LEDs in the buttons.
My Arcade Machine Build 