Thanks for the detailed answer! I actually made the switch from membrane keyboards cuz I'm too a violent typist that my colleagues felt disturbed even when I was on a membrane keyboard. After switching to the Haimus I've been so amused to see every membrane keyboard user nearby (mostly Mac laptop users) being way louder than me ;)

I'm looking to try more silent keycaps and switches, both tactile and linear. Interesting to see how the dampeners made such a difference to your TTCs. I should try those when I have the chance!

For now, besides switching to PBT keycaps, I'm thinking of putting O-rings on the Heartbeats when I can get my hands on some. They are already really quiet and probably won't benefit from the extra dampening on the downstroke, but I'm just curious how much quieter they can be without lubing them (I hate lubing).