Installing the dustwashers between the wood and the plastic is a great idea FractalWalk! Also, I plan to recess the joystick bolts and the trackball plate. To make a smooth surface, I would have to use wood filler or Bondo or something to fill in around the bolt heads and any gaps between the trackball plate and the wood. If I ever had to replace a joystick, that would make it a pain in the butt. Instead, by putting the CPO on top of a sheet of Lexan, I don't have to worry about the gaps around the bolts and TB plate. Also, I won't have to put as many holes in the artwork because the 8 joystick bolts will be underneath it. I can disassemble the whole thing pretty easily for maintenance or repairs. And, it's more authentic. (I don't recall ever seeing a commercially manufactured arcade machine with a plexiglass control panel surface - always vinyl.)
Regards,
Dave