I've always wrapped the coil wire around the shaft a few inches up from the coil. But then I saw in a some people mentioning they run the wire straight up the lower shaft then start coiling the wire above that. Someone mentioned the reason he does this is because of the magnetic field and possible interference wrapping it shortly above the coil. I have only been detecting about 7 years and always trying to learn more. Any advise/suggestions ect. on this would be great and thanks in advance.