MattG was kind enough to send me a couple of the PCBs and I put one together this week using the suggested alternate values. Easily blows away any of the 4049 fuzz boxes I have built in the past. Very smooth the the three tone controls are very responsive. Haven't had much time to experiment with the tone controls because I try out a setting and leave it there for a while.
Here are a couple of build pics. Since I had a nice Bismuth color box I called it the PeptOverdrive.
Looks great, thank you for posting! I like the name, too - definitely more family friendly than some of the earlier suggested names!
One small thing I noticed though - on your enclosure, the bass and treble labels are swapped (treble should be on the left, bass on the right). I know that's probably an atypical ordering of tone controls. I was trying to keep the PCB traces as short as possible, and I think I saved a few mm of traces by doing it that way.
I still have a few boards left if anyone else wants to join in on the fun.
I've now used this pedal in a band setting a few times - so far so good! Though to be fair, I'm using it as my "medium-high" gain pedal (drive knob set around 1:00), and not currently doing a lot of songs that call for that. But I certainly don't plan on removing it any time soon.
Chuck, are there other transistors that would work for Q2, the 2n5089? I'm flirting with the idea of doing an all-SMD version, and at least Mouser doesn't have an SMD 2n5089. The PCB fab house I use (JLCPCB) also offers SMD assembly, so I'm thinking maybe this would be a good trial run for that service. I could design the board to work with e.g. Tayda's pre-drilled enclosures, and radically cut down build time.