Been using my B104 R2 for a couple weeks now and I love it

! What an amazing project to come together... But damn did I not realize how truly big this thing is, I've (gently) placed my daily driver, which now lives at my office, on top for scale.
So far have been blessed with little to no issues, with one exception: small bits of plastic flake off some part of the beam spring module which settle down onto the pcb and cause keys to not register correctly. Has happened 3 times now which requires opening up the case and removing the debris. Not sure exactly what part they are from, but if I had to guess, the "beam barrel part B", or the keycap stem, or maybe even the bottom of the keycaps? The flakes are all white and plastic. I didn't want to mess with the module too much but in hindsight I should have attempted to locate the module the flake came from and inspected it to see which part is the culprit. Next time it happens Ill try to document it.
During keycap assembly some caps were harder to put on than others and required more force, this could have caused some plastic part around the stem or keycap to break off?
Edit**
Just re-read this part of the manual:
When putting the press fit washer back on the module, it is important that the module is pressed all the way down with a minimal amount of force; not so much force that you break one of the plastic legs of that white part inside the beam module.
Broken white “leg” on the beam barrel part B: you may notice a broken off white part when removing a module for adjustment. Sometimes this is hinted at when you can’t press a module down all the way.
This might be the same issue, however the broken off flakes I observed do not resemble the legs, it is possible its a sliver of the leg though.