Ah. Again. Well, even if I don't try to build one of these things, I've already had quite an education in electronics and its symbology. Thanks for your answers thus far. Couple more questions: Do I have to use a 12mm pot? I have not been able to find such a critter yet. What headaches will I incur if I use a different type? Does it matter what kind of capacitor I use? In the 0.1 uF variety, I've found ceramic, film and other types.