If you look at the picture, I sort of have that there already. The wood is angled and would have to be routed on the back or something so that the plexiglass can rest on it.. anyway, not an ideal solution and I don't think it would be very sturdy.
I do like your idea of a separate control bar for decals/player start though! Gonna see if that can be worked in here as well.
Thanks,
Shaun