The best Tone Poles I have ever heard are the ones made by a guy named Chainsaw in Humboldt. He makes them in his metal shop. I don't have the recipe yet, but I am sure I can get it from Skwid Larvae. These tones have the purest sound I have heard in a tone pole and even if the disc barely scrapes the pole it resonates for a long time. Visually they are very nice as well, with a bright silver color and nice yellow bands.
And yes, I did make this 65 footer!