Thomas Trackmaster Flexible Track with outer rails.

thingiverse

I recreated this using TurboCAD, drawing inspiration from dpk76's design as my guide. The motivation behind this remake was that while his model is outstanding, it lacked the outer rails, which sometimes caused railcars to veer off the tracks. Although I haven't conducted a thorough test yet, I successfully printed a sample section of the model and found that it fits the original Trackmaster pieces seamlessly. *** I recently updated the model after noticing a minor visual flaw. A couple of cogs were missing in the male connectors, which created an odd appearance when connected to the original track.