I finally got around to finishing my Boogie57, and I like the sound, but a couple issues.
1) The pot takes it from no gain to much gain instantly. This may be related.
2) Most important, unless it’s related to that same resistor, it’s loud. Like, absurdly loud. Testing it through my amp, I had to set the amp so bypass was barely audible–I could head the actual guitar louder–and turning it on went LOUD. Like from volume 1 to 6 just from the footswitch.
I mean, it’s just an old Fender Champ 15, but it’s no slouch for the el cheapo.
3) It creates a loud buzz. So far I attribute it to testing with the pedal unclosed and using my only available short cord, which places it right next to the amp. Will check into this later.

On the other hand, I didn’t have any trouble with biasing like I’ve seen. One trimmer is pretty much bottomed out, but all the transistors read at 5.00. I think I’m reading it right (drain should be far right, with flat side up?) and I assume I’ll have to re-bias after fixing.
Next time, I’m stocking up on 9mm pots. Offboard wiring all of these was the least fun thing I’ve done outside of work. And I do autopsies. Props to you guys that make the massive combo pedals.