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There are multiple in parallel because they're located in different places on the PCB. The goal is closer proximity, not so much additional capacitance. With that said, you could probably omit one or both of them without a tremendous (noticeable) impact...

Follow what is printed on your PCB, things have been moved around a bit. (You have the newest revision)

Not exactly on the bench right now, but in the vicinity.

https://forum.pedalpcb.com/threads/sola-sound-yellow-hybrid-tone-bender.5855/

You could have an ATTINY13, 25, or 85, depending on what was/is available at the time.

UPS has never been a forced option. If USPS wasn't available it was either due to an issue with their live rate system, shipping suspended to your area, or the shipment exceeded their maximum limits (First Class International is limited to $500 or less declared value, for example). If for some...

I'd be willing to bet the Harp Octave is a Green Ringer clone. Yes, the Harp Attack has a sub-mini tube. Anyone recognize the circuit?

Any idea which one he liked?

Yessir. 😲 Ahhh, you're riiiight. That didn't even catch my attention until just now. Yep, two NPNs. Q1 NPN Silicon BJT hFE=127 at Ic=4.99mA Vbe=0.673V at Ib=1.00mA Vbe=0.759V at Ib=5.00mA VceSat=0.066V at Ic=5.0mA and Ib=1.00mA IcLeak=0.000mA Q2 NPN Silicon BJT hFE=125 at Ic=5.00mA...

2N3903. I'll have some in stock by the time the PCB is available.

https://docs.pedalpcb.com/project/Schematic-Acrobat.png

I think you blow in through one of those holes to spin a tiny turbine inside...

To be fair.... there's at least a little going on in there... It stumbled across the bench, I figured I might as well.

It's not a fu..... oh wait, yeah, it's just a buffer...

Tricky tricky..... but folks have already done similar. :ROFLMAO: https://forum.pedalpcb.com/threads/this-is-why-i-dont-trace-circuits-from-photos.2698/

Seriously though, I'm just visually inspecting those caps and assuming they're unchanged... and that means nothing really. I won't know for sure until I measure them out of circuit, but this one definitely has been piggybacked to increase the value. I suspect those to be the only changes...

But..... they're already on a switch. :ROFLMAO: Can I put the switch on a switch in case I don't want them to be switchable anymore? ... right, but then someone is going to want that switch to be switchable... 😞

The sun and moon are like, completely different man.

I'll get a full parts list for you later today, but: 3 x MP39b 1 x TL072C 1 x TC1044SCPA Q1 hFE=43 at Ic=5.00mA Vbe=0.211V at Ib=1.00mA Vbe=0.323V at Ib=5.00mA VceSat=0.042V at Ic=5.0mA and Ib=1.00mA IcLeak=0.039mA Q2 hFE=64 at Ic=5.01mA Vbe=0.215V at Ib=1.00mA Vbe=0.317V at Ib=5.00mA...