i used 3/4" plywood in 1992 when i installed my twin shelf operation at our mountain cottage. At the time a friend in the cabinet business was having difficulty with MDF and he didn't like its extra weight. Anyway, the plywood shelves were located in the Domestic CEO's 14x32 kitchen/ breakfast room and she insisted that it be stained to closely match the cabinets. Our deal was that I got the wall space in exchange for getting my RR off her Den carpet. Sadly old age intervened so I removed the operation in 2008 in anticipation selling and relocating to our Greensboro Condo and source of better medical facilities.
Airborne ladder railroading , nothing like it.