If your cult effects pedals box is looking a bit empty, you could do worse than pick up a Maestro Rhythm'n'Sound - a very weird guitar pedal with built in rhythms, fuzz and octave. Inevitably, the Beastie Boys and Crystal Method have used these, and it may or may not have the same Fuzz circuit as the Maestro Fuzztone, which was used on Satisfaction by the Stones. (Thanks, Brandon)