Okay, because of your post I tested some silent Sea Salt Lemon from KBDiy in an NCR-80.
Unfortunately, these Sea Salt Lemon silent linears are louder than some other silent switches.
I tested them alongside [lubed] OUTEMU Silent Lemon/Lime tactiles, and stock OUTEMU “Butter Yellow” and “Topaz” silent tactiles.
The OUTEMU switches were all quieter.
The Sea Salt silenced linear, if I am testing the same thing you are, are indeed dampened. They are muffled and muted, but they are not entirely silent. There is something of a whacking sound, they thump.
It may have something to do with housing collisions, but they are louder on the upstroke and bottom-out than the OUTEMU silents.
They aren’t as loud as Ergo Clears in an NCR-80, but they aren’t silent.
In your place, I would try some kind of silent switch that is decent out-of-box. Maybe Bobagums if they are okay with north-facing lighting. I think OUTEMU “Butter Yellow” and “Topaz” silent tactiles are decent and cheap.
People seem happy using AKKO Silent Penguin in stock form, but they are tactiles. Medium-weight and intensity. But you can just put them in a board, apparently.
EDIT: I am typing this on a “silenced” NCR-80.
Having tested several "silent " switches on it, I would offer the following advice for you:
-Pay someone to lube some OUTEMU Silent Peach V2 for you. Allegedly, the Silent Peach V2 has capability to diffuse light through the stem or something like that, so it may be compatible with North-facing RGB.
It won’t be the cheapest solution, but it will be effective. [Use 3204].
The same strategy might apply to Bobagum. More expensive, but very quiet. You would have to ask someone if they are compatible with north-facing lighting.
-Try samples of Kailh Midnight Pro linear, if you can. The tactile version is good and reasonable. Not as quiet as OUTEMUs, but maybe you’ll get lucky.