Race Track curbs builder modules

Set of racetrack curbs for easy track setting for RC car racing or for kids play. Modules have their geometry details imprinted on the underside. designed with focus on printability and modularity and simple but sturdy part connection. In future I would like to add more modules for this system. Each part has its mirrored version. you can print the mirrored version of M2M or F2F reverser parts to change from left to right turn.Enjoy, and comment your ideas for next track modules!ideas for next modules already planned:- Cross section X, T shape- sharp 90deg turn- sharp turn for straight section- longer straight sections