LEGO Duplo compatible tracks rails.
This "thing" contain files with:
1) regular tracks with & without antiwarp parts (must be cut)
straight, straight-half, curved, switch (+part2), end
2) my special FLAT design to save filament and printing time
straight, straight-half, curved, switch (+part2), end
3) adapter "from regular to FLAT"
4) 19mm level-up track
straight, curved-left, curved-right
5) platform & build plates (beta version)
6) crossing (beta version)
Tested with ABS & PLA,  0.4 - 0.5mm nozzle, 0,25mm layer height, 10-25% infill...
Some files are X&Y axis scaled up by 100,6%. It is my tested final ABS shrinkage factor. I'm printing with 210-220°C nozzle / 100°C bed.
Not scaled files are intended to non-shrinking materials like PLA.
Small parts do not need this little correction.
2020.01 update:
0.7mm fillets on edges (except 19mm level-up tracks & switches)
new "FLAT_straight_long" track
2020.09 update:
FreeCAD files & info text files with my notes (it makes FCStd files more useful, but both Freecad and…