Nice? I haven't seen it yet. How it's done? Absolutely.
Trust me, they're nice. I used to do my RC planes like this, then got out of the habit. I need to get back in...
I've used Kleet hinges that hold a wire with a 90 degree bend. Not rocket science there.
Any pinned hinge. The ones that I've seen all have what looks like a sewing pin, either installed and pre-bent, or supplied with the hinge. Set those aside (or take them out). Then find the size of music wire that fits best through the hole. Put a bluntsh point on the end -- enough to ease it into the hinge, but not enough to hurt if you bump it.
Just a guess, but placing these hinges close then use only one long wire to reach first hinge to last hinge?
Use your normal number of hinges, and a wire that reaches from the outer edge of the surface to at least an inch inside the inner hinge, or the center of the aircraft. There's no real reason not to have the wire extend the entire width of an elevator, if it works out.
How do you get the wire in place?
Bend the surface to its full deflection, thread in the hinge pin from hinge to hinge. You may need to "coach" it a bit with tweezers or needle nose pliers, but with the surface deflected you should be able to get in there OK. The way I retained the pin was to just stick the end of the "U" bent section into the balsa of the surface -- it
looks like that's what Paul Walker does, too, but I couldn't say for sure.