Has anyone recessed the aluminum covers for access? I am putting both sides on to access both brake and heater/ac stuff and for symmetry. I am thinking about recessing them to sit flush. Has anyone done this? I am thinking of making a fitting for my dremel to use it like a router to control depth unless a anyone has a better idea. I'll then add a couple layers of glass behind and put rivnuts and counter sunk bolts to hold it down.

I'm open to suggestions on accomplishing this before I attempt it if anyone has another idea.