I've reached the end of Act I of the novel, structurally speaking. This also means I have just reached the end of the expanded version of the short story. The expansion ratio (so to speak) is just about 10:1, from a 6,700 word short piece to 65,000 words of novel.
I'll have some thoughts later about the differences between the two. It's rare for me to have that difference cast so directly as this process.