I have made a few display cases years back for my HO collection with glass shelves and glass sliding doors. I too used a mirror to the back of the cabinet to ad more viewing of the engines inside. Now I would like to try a large wall mounted shelving unit about 67" wide and 6 shelves high for my O scale. I need it to be dust free and able to support the heavy O scale engines Being over 5 feet wide. I guess I need to support in the middle of the span to eliminate any sway but I want to keep the shelving thin as not to be the main focus of the unit. Have any suggestions on a material or product that may fill the thiness I desire and eliminate the sway. Shown is a display I made over a decade ago but I just can't be making a bunch of these to display
