Following a request to see the helices on the layout I've put together this video showing a train run two complete circuits using the inner and outer helix lines. The two helix tracks are 2nd & 3rd radius, but would recommend going 4th radius. Any questions - just ask in the comments below.
Music : Epic Angel from : https://soundcloud.com/e-soundtrax/ep...
Soundcloud: bit.ly/3yzKlgd