If I do make a small coil using a wine bottle, I need to cut about 1.5" off the neck of the bottle so the small toroid won't be too high. Does anyone know how to cut bottles? I remember reading that you can take a string soaked in lighter fluid, tie it around the bottle, light it and let it burn for 10 seconds or so and then dunk in it a bucket of water. Has anyone tried this - or got any better ideas? Ed Sonderman