After posting, I started a few Bing searches, as well as an eBay search. Got a few answers regarding operation of the FF system, although no past posts on mechanical refurbishment. eBay, however, came thru! I managed to find a NOS Shimano two part tool set for removing the freewheel and crank freewheel. Bought it immediately - I've always got room in the drawer for another specialized tool, and this is far from the first bike like this that I've noticed in the Richmond area.