The only thing I might add is that you can wrap your copper wire around a dowel rod before you start wrapping, which makes it easier to handle while wrapping.
I also put a couple of coats of polyurethane wood finish on my jig, just to keep it sealed up and not get dirty over time.
The workmanship is absolutely wonderful, by the way, like everything Gerry did. His airplanes were works of art.
Brett