I totally agree with your way of seeing the chart. The only option, that I also note in my analysis is that the linking A-B-C between the ZizZags is already finished:

I do not see any clearness in the A 5-3-5-3-5 and B 5-3-5. There is a bit more thoughts in my previous post, please see, if interested.

Thanks for your analysis. I never read your post before posting mine and enjoy, when finding similar ideas here!

Good luck, @ew-and-patterns!