Interested in 3D printed models and in model trains,
I designed some additional DUPLO train tracks accessories for my grandchildren:
- a turn table with maximum 12 tracks at 30 degrees (needs a special track with cut corners) (*)
- a curved track with larger radius to make parallel curves (compatible with the standard track switch) (**)
You find the printable models (STL files) on Thingiverse: https://www.thingiverse.com/phildc/designs
(*) look for the model(s) with angular notches. A variety of tracks disposition is available: https://www.thingiverse.com/thing:5655416
The full 12 tracks: https://www.thingiverse.com/thing:5766558
(**) the larger radius curved track (R2) https://www.thingiverse.com/thing:5774273
