Thanks for your thoughts on this, Pulpmeister.
The sub-chapter arrangement is an interesting idea, and I can't see any reason why it can't be made to work. I had been thinking more about the
post from ekbell, and wondered if they may have been thinking along much the same lines and I missed the point when I first read it.
It is an idea worth serious consideration, and it would resolve my concerns about how to present TOC. So it's nice to have another option when I get to that point.
P.S. I'm hoping my own work will not leave anyone in any doubt as to whether I can write sustained scenes - my problem has always been getting my characters to shut-up and get on with it.