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I will be using pegboard...that way if I have a MULTI pack I can place a hook/peg and just hang up my multi pack!
I would cut a piece of cardboard the same width of the Hot Wheels card and use the cardboared as a template for spacing the dividers evenly!
Those plastic vertical pieces would be found in the paneling area. They are used to join one sheet of paneling to another and the single opening would be for the end of the exposed panel...Great Idea and Thanks for sharing~
FYI....Those plastic spacers come in different colors or even in wood grain!