Insert blocks on the curve in the direction of de normal

[mzjensen]

Try this in a code block, it should correct them:

zaxis = CoordinateSystem.ZAxis(cs);
origin = CoordinateSystem.Origin(cs);
yaxis = CoordinateSystem.YAxis(cs);

zaxis.Z < 0
? CoordinateSystem.Rotate(cs,origin,yaxis,180)
: cs;