I designed these bumpers for Choc keycaps, they do the same thing as o-rings on an MX switch (quiet the sound and cushion the bottom-out) but can be made from much thinner material.
I’ve laser cut several sets from silicone placemats (0.7mm thick) which I’ve daily driven on MBK, LDSA, and CFX caps, they sound and feel good! You could also use 0.5mm Poron or EVA like are used in switch pads, EPDM, neoprene, whatever.
They do not alter your switch travel but they do raise your keycaps by the thickness of whatever material you make them from.
This is awesome. Thanks for sharing.
How did you laser cut them? Do you have a cutter or is it possible to order silicon laser cutting?