This is why I used the loopback address.
So, a UNC path uses the "user-friendly" hostname OR an IP address... SOOOO... Since that is the IP address of every host with the loopback adapter installed AND every host on our network has the loopback adapter installed; rather than use the hostname which is DIFFERENT on every host I used the loopback address... AAAnd it worked fine. That's because it's the hidden admin share for EVERY workstation and it doesn't rely on DNS, not that it matters, but it also means I don't have to create an entry FOR EVERY machine using "what you said." Further, I'm not going to share the naming convention of our organization and it "deffo" did work. I digress.