Thanks Alex—that makes sense, and I've gone ahead and built the corpus survey.
It maps his full short fiction (collected and uncollected) alongside every novel and omnibus, with first-publication details, public-domain status, and the available transcriptions and scans for each. A few things it turned up that bear on omnibus planning:
So a complete "Onions—Short Fiction" is a sizable, multi-collection omnibus—one I'd be glad to take on, and the survey already maps how it breaks down. The scale itself isn't a concern on my end; version control and a careful, verify-as-you-go workflow are familiar ground for me. It's really a staging question more than anything else.
If it's useful, the cleanest way to stage it is to let me produce Widdershins first—a self-contained volume that ships as a finished piece and puts your house style in my hands, with the remaining collections folding into the omnibus from there. The groundwork's done either way, so the omnibus is ready whenever it makes sense to build.
Glad to follow your lead on how you'd like to stage it.
https://docs.google.com/spreadsheets/d/1s41b6rauJf5cxCej0tdzMRGL6J-PM7yiQci-yLDrLdk/edit?usp=sharing