RN314 re-syncing even though sync completed

Thanks StephenB, will work from your list. First up, a UPS. Thinking about this one, about two hundred dollars on amazon:

CyberPower CP1500PFCLCD PFC Sinewave UPS

1000W / 1500VA, 1445J surge, 6 battery backed/surge protected outlets, 6 surge protected outlets

Studying these, it seems nothing new has happened in the world of UPS in the last 20 years. Some of the models out there are literally 15 years old.

Biggest gripe:  can't find any with more than one USB handshake port. I realize there's this NUT concept where ethernet-connected boxes can be relayed a message by the box that's USB-connected to the UPS, but that literally means that all networking gear in the chain, up to and including the router, have to be battery backed too or that NUT command is 100% useless. Correct me if I'm wrong. In my case, router sits in a different room, and the 2-story house has switches up and down, so there's no way I could keep an ETH network alive without sprinkling UPS's in (at least) 3 locations. What would be infiintely better:  (1) multiple USB's with command capability (qty 3 or 4) with software that can handle that; or (2) a daisy chain connection option between NAS's that's specifically dedicated to UPS triggering.

Strategy with this UPS will be to USB-connect it to the big gun (RN528X), and leave the other 2 NAS's to die if/when the UPS battery runs out. My thinking here is that a UPS may shut down more "gracefully" than an unprotected wall outlet, meaning from a surge viewpoint. Obviously the non-USB connected NAS's are still going to suffer an ugly power cutoff.  The UPS world doesn't leave me with much choice, unless I'm willing to buy a dedicated UPS w/ USB for each of the 3 NAS's. I guess I can look at that option instead, what a pain in the butt - all because these arcane boxes can't send a trigger message to more than one box in an event. Dumb.