I have been taking my cars in the large tubs from Rubbermaid but being that they dont have any that fit well and are easy to move and store, I decided to make something that would be well packed and easy to store. I made a frame with 1/2" birch ply glued and air nailed together. I also have metal corner braces in the bottom inside to make sure it wont seperate from the weight. They are designed to fit 6 cars and with a height to accept all of my freight cars in any box. My orignal plans were to dado out a groove for the dividers which are 1/4" luan but I decided against it as the width of the cars vary too much. The Stock cars are the widest and I just had to remove one of the dividers. The foam is from Lowes and is in the insulation asle, comes in a roll of different widths and I used the 5" size. 50' rolls. The overall size is 22x35 and fits perfectly in the closet for storage.