I finally decided to install O rings on my cherry mx blue cooler master quick fire TK mechanical keyboard with cherry mx blue switches to lower the sound due to bottoming out.
For all those wondering how many O-Rings to buy, you need exactly 100 rings for the quickfire TK, no more no less, the perfect 100. A hundred O-Rings costs about $1.87 on amazon for a pack of 100. I thought that 100 would not be enough, but turns out 100 was the perfect amount to install on every single key including the ones which require 3.
I used a credit card to remove my keys since I did not have my key puller on me. I pulled the keys, put the ring on and put the key back and pushed down hard to make the ring go down. All in all it only took about 30 minutes to do and it reduces the noise of the keyboard significantly.
This is the one I purchased from amazon.
008 Buna-N O-Ring, 70A Durometer, Black, 3/16″ ID, 5/16″ OD, 1/16″ Width (Pack of 100)