Originally Posted by Moonman:
A good break from the brain strain. Looks like you are on your way. if you are using 3/4" ply, you probably don't need the center supports. 1/2" ply, use them.
See if you can a find speed bore, a hole saw or an auger to put some holes in the crossmembers for wires if you use them. It will keep it neat. 1/2" or 5/8".
I put the center supports in just for the mockup might keep them not too sure. Thanks for the tip on drilling holes for the wires