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I don't see any trimmer on that board (sole have to adjust the bias)... but yes trying the pots could help you see what does affect the audio or not.

Have you tried to unbox it and see if signal goes through ? Electrical tape will get punctured by you cut leads, specially when thightening the pot to the enclosure, it's no good, you are better off with a piece of cardboard.

Here is the drill template I used for mine. Fell free to use. Robert told me that if you use a 5mm Male standoff paired with a 20mm Female standoff (on opposite sides of the PCB) you don't need any mounting holes or hardware on the outside of the enclosure...

If you like how that one turned out, I could share it. Thread 'A powerful trio' https://forum.pedalpcb.com/threads/a-powerful-trio.21563/ Edit : you can now find it here https://forum.pedalpcb.com/threads/usb-power.28655/

Could it be Side A went through but side D is the problem ? Edit ... I guess if A can be edited it might be the problematic one.

That's an internal switch, set to your preference and forget.

The 3 holes are to accomodate different lead spacing for electro or film caps. With tantalum, polarity must be correct so the + hole is important, my guess is that the 2 others are connected together, so yes outer ones are correct.

Using the TEC 3-0922 would do it Edit, as @jwin615 pointed out, the 3-1222 if you want to use a 9-18v power supply. Is there is a voltage regulator before the traco ? What circuit is it ?

I'll admin it's weird that lifting ground makes it working ... Yes, that means those 3 portions of the IC are not connected or not in use (like using only half on a dual opamp.)

The troubleshooting thread would be the best place for this. Also, adding pictures can sometime help. Have you tried swapping IC7 and IC8 to see if one of those could be bad ? Since lifting U3D out of the circuit makes it work, it may be somewhere between U7 and SUB1 pot maybe ?

In the build doc, that bottom right electro is in the same orientation as the others. Is it possible you installed it reverse ?

Bottom right pot middle lug looks like it's not soldered. Might not solve the problem but ...

One of the last bike ride this year, such nice weather in Montréal today.

Does not look so bad, I thought they were rougher than that.

Same, I don’t need a texture but I like a matte finish.

I don't remember a pink sand texture, nor blue. Are they switching basic matte to matte sand ? I know they recommend matte sand black over matte black.

@Robert just noticed the muffin fuzz has been revisited to include tone bypass switch and some of the various build BOM changed ? What do those relate to in the new doc ? What I liked about the previous board was the possibility to build those in 1590B format, but I get the tone bypass is a...

Anybody ordered the Chrome Green, I don't remember it being mentioned here and my last order was like 9 months ago. https://www.taydaelectronics.com/1590b-style-chrome-green.html

It's ugly inside, but here it is.

Turns out stupid me did stupid things. When I engage/disengage the effect, there is often a clear loss of volume before it goes up again. So here are my questions. 1 - Did I do something wrong again : bad bias of the J113 or something else ? ---> YES I DID ... I tried testing it again...