I've had as many as 5 on my board at a time. I can get away with two, one mild, one heavy. And honestly, if I had to, I could get away with just the mild. But I like having fuzz available. My tastes in fuzz change a lot, and I like to change up varieties from time to time. I also like the blends I can get. But I just plain don't need 5 on a regular basis, so I keep them and rotate them in and out occasionally just to shake things up. And then I always come back to my two favorites, Ampeg Scrambler and MXR Bass Distortion. If you can use them, use them, and if not, cut 'em.