Wouldn't it hit on the shelf/ledge that runs around the recess? Or are you meant to take a bit of wood out?
I know a easier way. I have showed it before but i dont think anyone really took notice.
Maybe later i will show you again.
I'd say there's a solid "snowball's chance in hell" that you could install that without taking out any material. It looks like a really complex solution to a very simple problem.
I hear a 1971 quarter works pretty good. Requires two extra screw holes in the finish though.
I tried once using a 1974 quarter and it was a total failure...
Tremol-No