So right now I am trying to replace my current fuzz, Frantone's "The Sweet" which really doesn't sound great on bass. I was originally going to get an Effector 13 Truly Beautiful Disaster but E-13 is currently undergoing a manufacturer change and their art is also changing. Head over to http://www.oohlalamanufacturing.com/ sometime to see the new art- it's on the home page and is absolutely hideous. Believe it or not the art was enough to turn me off to the pedal- i had actually already ordered one from a website but canceled the order once I saw the new art. So right now I'm trying to decide what fuzz to get. I basically have narrowed it down to between the Malekko B:assmaster and the ZVEX Wooly Mammoth. What would any of you people with personal experience with these pedals recommend? The only other effect pedal in my rig right right now is the Guyatone Ultron. Aside from simply wanting a good fuzz sound- ive also been trying to get a fuzz in order to give me added sustain so I can use the wave oscillation on my Ultron very well by holding notes for long periods of time.