To see how these things work, I moved my "Little Muff" to the bottom half of the breadboard, and built an LPB-1 on the top half. The trimpots are 500K, and they're in place of what will be the "Clean" and "Fuzz" pots. Signal goes in to lug 3, comes out of lug 2, and shunts to ground via lug 1...