Turns out Spanner 23.5 is the most incomplete section of Chapter 23, with the least number of Revision 2 or previous-chapter scenes that merely need editing. 23.6 is the most complete (or was when I started editing Chapter 23), so it's going to post the day after 23.5 regardless.
What's stymieing me this time? (Darling muse, I love you to pieces, but you don't get to take a break until the chapter's over.) By plan, this is the most abstract section in all of Book 1. I'm not so much editing it or even writing it from scratch; rather, I'm constructing it, and construction takes time.
Probably the first thing I'm going to do with the Revision 5 one-pass edit is rework the formatting of Echelon's lines. I kludged the CSS so I could get 23.2-4 posted quickly. 23.5 involves a lot of CSS hacking.
I'm working on 23.5 now, and I hope to get it posted tomorrow. If not, I'll let you know. But I'm finishing Chapter 23 and Book 1 no matter what. 23.5 will post.