So - I do not know if this is expected behavior where the answer is "Well, don't do that?", but :
I finished building the Crown Jewel, and aside from finding exactly how many swears I knew while getting the switches and pots lined up, everything seems to be hunky dory EXCEPT:
If I have both clipping switches in the middle/"off" position, the distortion is like "My Rat from 1989 is running out of battery, is super fizzy, and kind of sounds like I'm running a ring modulator as well.
I get the exact same sound if I have hard clipping off, and soft clipping set to LED.
If I back off the drive to between 8 and 9 o'clock, it gets less gonkulator-sounding, but still sounds like a pedal with a dying battery.
Both sides of hard clipping, and Si soft clipping work as expected, this is purely happening on LED soft and "all off"
The one photo I happen to have until I get home later :
https://photos.app.goo.gl/g8l0FWwV4Iym3gL63I'm still planning on giving the board an alcohol/acid brush cleaning and pulling out the magnifying glass (and sending more and better focused pics, unless someone says "Oh yeah, we've seen this before and..."), but I've reflowed the board, don't believe I have any solder bridges/inadvertent shorts, and am 99% sure nothing's installed backwards, and have spare opamps on the way to test with. I do have a multimeter that I am learning what I'm doing with to test.
Any ideas/"where next" suggestions?