Customizable train tracks - Improved

This is improved version of Customizable train tracks


It is customizer now! You don't need to use OpenSCAD to generate tracks!
But, if you want you can open the single file lego_duplo.scad in OpenSCAD, you don't need to download any libraries
You can generate bricks, plates, tracks and calibration parts
Tracks were improved to print without any supports - improved knobs and long bridges (set geo use offset to No)
Fixed some code issues, which produced non-manifold stl


Version 2

Set default knob and stud diameter to 9.4 (KnobD and StudD)
Set default wall thickness to 1.5 (BrickWallT)
Added small chamfer on the top of knobs
Updated calibration parts: dynamic size (depends on GenerateKnobsX and GenerateKnobsY), second track end
Got rid of TrackRadius, use Track Length for straight and curved tracks (in studs)
Updated curved rails to Type 3, so length of 4 curved rails (30deg) is equal to 4 straight rails (see more here: Lego Duplo Rail Dimensions article 4