I use clear dampers on HyperX Alloy FPS with Cherry MX Blue switches and they have greatly reduced the number of keys that touch the ground! This keyboard no longer gathers dust in the corner with the bang it makes as I speed up while typing emails. The Alloy FPS has red LEDs on top of the switches and I don't notice any O-rings causing any issues. how the backlight is displayed. Key travel is somewhat reduced when using them, but it took me an hour to learn how to do this. I wouldn't say anything negative. None of them broke during installation and they fitted the keycap pins pretty snugly. The spacebar is still pretty noisy compared to the rest of the keyboard, but I can try replacing the spacebar with another one that has less space under the key. All in all, for $7 it's a good investment if you (or your co-workers) hate the sound of your keyboard.
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