Shin-Ei FY2 Companion Fuzz with post-boost

From the vendor

Really skanky vintage fuzz tones. Fizzy, splattery, over-the-top and gloriously nasty. The original circuit has a less than earthshattering output level, so this version has an added LPB post-boost to make everything go up to eleven. Includes pads so you can easily add the mids-scoop pot mod. The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. If you want the PCB without parts there's a link for that at the bottom of the page. Partial kit: PCB, all board-mounted components, pots. Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED. Enclosure (pre-drilled) is available as an option with full kits, and can take a battery if desired with footswitch positioned 22mm higher, closer to the controls. Knobs are not included. Builds are only available with full kits including enclosures. Please choose appropriate knobs. Inspired by: FY-2 Companion Fuzz Difficulty: Medium PCB size: 50 x 22mm Knobs required: 2 (3 with mids scoop pot) Enclosure: 1590B Direct-Connect compatible (4-way) Download the INSTRUCTION PDF Here's the older version