The Grinch is a turbo'd Density Hulk (Tim Lefebvre spec) plus a Vitriol ran in series (Hulk > Vitriol). Right footswitch is bypass and the left toggles distortion on/off. This is a cool pedal but I would prefer the ability to run these two effects independently. As it is wired in series, you can run the Density Hulk alone but not the Vitriol. Demo below has both effects running. DEMO LIMITED RUN OF 10 UNITS from December 2017 MINT-AS-NEW, NO VELCRO, ORIGINAL BOX USPS PRIORITY SHIPPING INCLUDED TRADE considerations (plus another pedal or cash to even out value): Neunaber Immerse Reverberator Providence Anadime ABC-1 Bass Chorus Broughton Josh Wah Analogman Chorus w/ Depth toggle Red Panda Tensor PayPal / questions: edbocchino (AT) gmail (DOT) com Thanks!