I tell you why I don't like helixes in this video. We take a close-up look at the construction and operation of my "eastern" helix
Here's a wonderful video that demonstrates an effective alternative to potentially troublesome helices on a layout. That alternative is a gradual around-the-room incline from one level to another level of a multi-level layout.
https://www.youtube.com/watch?v=Me9GNK2vxjc
N-Scale Union Pacific Evanston Subdivision Facebook Group: https://www.facebook.com/groups/724442657753901/