These are handmade, hand-wired clones of an old school sustain/fuzz made around '90/91 that has been nicknamed the "Russian" or "tank" version by many. This version had slightly less gain but great "harmonics" and BIG round bottom end that has made them a favorite for bass players and stoner rock guys alike. These are considered by some to be the highest point of this company's fuzz design. I use carefully selected high gain NOS 2N5088 transistors for these after fine tuning them off several originals.
These are full sounding fuzz with more mids and the highest output and more bottom end than some others in the series. They have a slightly gated sustain on full. These are the muddiest and biggest bottom end of all the series. Check my blog for more details.
My designs are inspired by the classic old units but with modern components and appointments and many options like true bypass or non-true-bypass switching, LED's, added "active" tone controls, boosts and "Boss" compatible 9-volt adapters. NONE of my pedals use batteries.