Does anyone know the key differences between the different versions of the Cusack Tap-a-Whirl? I'm looking to buy a tremolo pedal and I really want one with tap tempo since I use a lot of delay. The latest version, I know, has 24 different wave forms. I think that could be really cool to mess with but I'm looking for maybe 3 or 4 different basic wave forms at the most. Does anyone think it is worth hunting down the first version of this pedal if I'm mainly concerned with tap tempo for simple wave forms? Anyway, just curious... Also, are there any other suggestions for tremolo pedals with tap tempo?