Hi all...i am currently making a painted shelving unit and was wondering what to use for the back sheet? I believe it is customary to use 1/2" thk plywood, but i have a sheet of 3/4" thick cab grade that would work too...would there be any drawbacks to using the thicker material? My first thought is that it would add more weight to the rear and would stabilize it a bit, but who knows. It will be going into a 10 year old boys room...any input would be appreciated!