Hi, i have and use the Scream Regulator long ago developed by builder Troy Barry who has since been long retired. I was wondering if anyone else out there has &/or still uses his Scream Regulator pedals?? He made only 13 rackmounted versions, which is the model I use. Not exactly sure of the number of pedal versions that exist. The Scream Regulator lowers or rasies the volume only, but not the gain. It is like having a "second master volume control knob"!! Anyone else out there a user/owner of this very cool & useful device??? Thanks!!