So, no shocker - the A to A (even with the special coupler) did not work. Luckily the $17'ish shipping fee becomes a little more bearable when you purchase more gear from their Store. In addition to the USB cord, I picked up a blade module kit, spare nozzle, some other goodies which in retrospect seem to be reasonably priced, and the shipping fee remained the same.
I haven't scanned the forum too closely, but there should be a PSA on how flimsy the micro USB port is on the Flux. It only took exactly one cord tweak when moving the unit against the wall to break it. I wonder if a right angle micro USB plug would help matters for folks who still have a working port.
Anyway, hopefully the stuff arrives soon and works. Otherwise expensive paper weight. (Very frustrated there isn't any intelligible way to get the default WIFI password. Nothing works, and would it have killed them to just have a standard default wifi password for the Flux?) Le sigh.