Update- Have had the hub back in action for about a week now. And- still have a highly intermittent clunk in low gear. There MUST be a damaged tooth the low gear pawls skip out of, that I missed. But, the hub is entirely rideable as is, and the shifting and ticking sounds are much nicer with the innards cleaned and lubed. At this point, I am just going to ride it until it either bombs, or is due for another major teardown, inspection, etc.

So much for my delusions of adequacy on a resolution of the clunk. Digging in to the NIG S/A has been rewarding in itself.