I've simplified the build process so that it just rsyncs a backup from the db into the repo, rather than trying to figure out whether it needs to or not. I've finished the diagnostics process, which reveals a highly-consistent and well-managed dataset, and sent the one or two little inconsistencies to PAB to fix. I think I'm done with work on this now until we know for sure that all full-size images can be shown, in which case PAB needs to finish creating the displaysize versions, and I then need to turn the displaysize image into a link to the full-size one.