I thought that the only reason he knew about the synology index daemon was because he owned one himself and went spelunking. i.e., I don't have to pass him anything because he's got more or less the same OS on his NAS.

By the way, here is how I can tell I'd messed things up: There is an option in the DS video program, in the "settings" screen, to select a folder and "re-index" it. When things are working correctly, that indexing procedure finished fairly quickly. After making each of the modifications I tried above, that indexing process never finishes and new/deleted files do not appear/disappear as they should.