I've been doing this too, with mine! A recent discovery is that if you keep all the Y pieces pointing in the same compass direction you seem to end up with a track which is always 100% traversable in either forward or reverse.
Traversable doesn’t change if you bend parts of a track, and that can change the compass direction the switches point at.
For example, if part of the track containing a switch has an S shape, moving the switch from the center horizontal to the top or bottom one turns it by 180 degrees without affecting traversability.
