Because I started with Stephen’s FollowSpline demo project, showed all the changes I made, and then constructed the level sequence in the video, I thought all the pieces were there.
I did decide to keep my errors (and reactions) in the video and did not clearly explain what went wrong, so I can see where that might be some details lacking.
If you got the demo project and tried to go through the processes I would be very interested in learning where you got stuck. I’m sure I can add additional info wherever necessary.