Ender 3 firmware v4.2.2 silent dampers mod.Must have if you don't upgrade to v4.2.7 board/. Here is the video to follow if you want to silence you Ender 3 with dampers if you have an Ender 3 that has press fit gears and a v4.2.2 board. https://www.youtube.com/watch?v=IjzrNoFnbcI