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I am marking this solved as I did a second resistor check for my sanity. Lo and behold R6, at 2.7K instead of 10K like in the build docs.

You could make the Gear toggle switch a footswitch to have a pseudo 2 channel pedal, using the FB loop on as CH1 and FB loop off as CH2. Almost like Crunch and Distortion on actual amps.

Looks good to me, I did the same thing to make a phantom power amp interface for my bass with active electronics. Here is my stripboard layout if you want to compare, I did put an 18V zener diode at the end as overkill.

Of course man, most of the time it's the little things that make us want to pull our hair out over a project.

Did you confirm pinout direction on your JFETs? And make sure the solder joints aren't cold joints.

What does the pinout on your jacks look like? Generally non-switched jacks are 2 pin mono and 3 pin stereo. If you have mono jacks with 3 pins you either have a switched tip or a shunt to ground, of which you don't use the shunt to ground on this build. If you have to buy new jacks I...

Would that impact layout or size in any meaningful way? I like that I can squeeze your smaller boards in a 1590B.

What's going on with the wiring? And are you omitting the LED?

Nice.

It is the only schematic for a 535Q out there, no one was traced another and posted it to the web that I can find. I do not trust schematics that have only one source that is unverified.

Any chance for a schematic with the build? This sounds interesting enough to build as an experiment.

You could jumper the 15K resistor on Q4 and use a 100K trimpot in place of the 50K like in the PPCB version. If you really wanted to you could do it with all 4 transistor trimpots.

Also compare the schematics from Aion FX and PPCB to see if there are any differences that are meaningful enough to note.

I know it sounds like beating a dead horse, but have you verified all resistor values to be correct? It can be easy to mistake a 10K with a 100K if you aren't paying enough attention. It's a mistake that I've made a handful of times and I'm sure it will happen again.

Any chance we can get more details on how you decide on the measurements and radii of the border for your designs?

I am not sure that schematic is correct, I would like to ask OP to count all resistors, and capacitors (separate the electrolytics). Write all the codes on the resistors down and use an SMD decoder to get the values and then cross-reference with the posted schematic to see if it lines up...

May I have the schematic for the 3PDT Breakout Board with Output Boost Robert?

Any chance we are getting a Boneyard Edition Chuck?

The voltage regulator is outputting exactly 5V, VREF is at 4.5V, and VCC is at 9V. I also put the Gain trim on an external potentiometer. All resistor codes check out, except for the LFO current resistor, I have an 1.8K in there. Capacitors are also good.

I can do some checks tomorrow to double check my resistors and capacitors. When I'm done with that I'll get those photos as well.