I had the original Timmy and really liked it. Then I got version 2, with the toggle on top, and everything sounded the same. Then, the new colors came out and the op amp chip has changed. I didn't like it so much (although some people do). I believe Paul C went back to the original op amp chip for some reason, and I got one of "these" pedals. While the op amp is back to the original, the tone was a little different. I see that a few other things on the board have different values. Anyhow, my favorite Timmy is Version 2, first revision. Just like the original, but with the toggle switch on top, and standard blue color. I'd like to buy another, if I can be sure to get this one.