I currently have Bass>Tuner>Durham SexDrive>Subdecay Quasar DLX>Mr Black FwonkBeta>TC Electronics Sub N Up>Amp everything works great thru the signal chain until i switch on either the MR black or tc pedals. When either of those is engaged I hear an significant increase in volume level. Their is no blend or level controls on either pedal they are either on or off. I am thinking of adding a Boss LS-2 right before the Mr Black and having the mr black and TC pedals on their own loop so i can use the boss as level control. Only other options i see are: buying different octave and envelope pedals that have level/blend controls paying someone to mod the mr black and tc pedals. Any other solutions that i am missing? Leia said it best when she said " Help me Obiwan. Your my only hope."