I'm not sure if this actually qualifies as a "layout", but I am planning to build an O scale around-the-walls shelf-style layout that will occupy a shelf about 9" wide, about 66" off the floor (eye-level for me). I'm thinking about using right-angle shelf brackets to support the shelf. The wall studs are about 16" apart, so I could put an angle bracket at each stud location, but I'm wondering what material would be a good choice for the shelf given that it has to support heavy O scale equipment? Foam board seems out of the question, for example... Thanks for any and all suggestions!