So, I had a look at your massive board pics in the other thread to see if I could see any similar scenarios that I had been in, and there are a few:
A) power supplies under certain pedals, especially foogers can contribute to noise. The low pass is bad for this, as are wah pedals, and sometimes the phaser.
B) CV connections between foogers - tho they serve a purpose, they can cause issues, and sometimes cause ground loops, noise and unexplained events. As a rule I track these noise sources when they appear, and decide if it’s live-able / controllable / or just annoying.
C) TRS cables or TS cables… Sometimes one is noisy, sometimes the other isn’t.
D) pedal enclosure contact - through touching directly, or via the mounting system. Tho this is unlikely, it does happen, and can be a source of noise.
Those are the big hitters for me.
Suggessted steps: since your board is large ( I have experience building and troubleshooting many sizes; and this good for every pedal / synth musician out there) it will require patience, pen and paper and patience - lol or not 
Start with finding the noise. Start at the beginning of your signal chain leaving the physical location of the pedal as it is and begin to unplug all connections in sequence. If the ring mod is making the noise you should hear it disappear only when you remove the jack from the output and all pedals in have been removed. If it disappears any other time, you have found your sound source.
Next… The reason that I suggested keeping the pedal in the location is so that you can isolate the real cause of the noise. Even though the source of the sound could be the ring mod for example, the cause could be anything around the pedal, or inside it. To eliminate inside, remove the pedal from its location on the board, and test it solo, and away from other sources of noise. Use a single power supply like a wall wart, not a pedal power or similar supply as even they cause problems. Be sure to use proven cables, and equipment. If the noise is present, you know the pedal is the problem, if it’s gone, you have more work to do…
Start with electro magnetic issues by powering the pedal, use long cables pluged into the chain as normal, the move the pedal over the area it will sit. If the noise comes and goes, find the source and make sure that there is a lot of distance between the two. I have an MXR eq that hates being around my pedal power for example. If the noise is constant keep looking…
Put the pedal back into its location and hook it up as you want it. This is where it gets annoying. Start by removing power cables one by one to see if this has an affect. If you find a change, start focusing on the connections from that pedal / power supply. Isolate the problem pedal to see if it is the source etc. You may find a bad cable or power connection at this point too.
This should help you find the real issue. It could be really easy to find or near impossible. I had an OCD powered at 18V at the end of my chain, that caused a noise to travel through to a compressor near the beginning of my chain. Took me almost a year to discover this was the cause. I sold the compressor. Another time my LPF emitted a low frequency that only the ring mod would amplify. Turned out that was a radio station that didn’t quite tune in.
@Pantherairsoft - what’s the pale green three knob boss pedal? Let us know how your search goes - I would start by removing the CV to carrier in to see if that’s the link providing the noise…
