The first dedicated wiring problem was how to get wires from the cabin to the tail. After a couple of attempts with stick on wire holders I decided to use this light weight plastic water pipe from Home Depot. I can push as many wires thru it as I'll need. It is stiff and light. Using it will prevent chaffing on the aluminum.
I hope I don't end up having to separate servo wires from light wires or antenna wires. So far no antennas are planned for the tail. I think even the ILS and VOR antennas can go in the wing tips. We'll see later.