an effective way to make a wire tunnel is to get a piece of 3/8 copper tubing (thin wall) long enough
to fit from the root of the wing to the servo cutout. Sharpen the tubing with a razor knife and slowly
use the tubing by pushing into the foam and using a slight twisting motion to cut. Back the tubing out every
inch or so and clean out the scrap, then continue further into the foam. This procedure will leave you with
a nice tunnel and make extension install very easy.