I'm living in Europe and buying those WASD or Max Keyboard O-rings is too expensive for me to be able to conduct some tests ! Shipping cost is around $7 ... roughly half the price of the product, not cool at all
After some research, I was able to buy some o-rings directly from manufacturers in China. It took some time to come to me, but once there, I was glad to have the choice between several different thicknesses and hardness.
Here are the ones I've tried :
Moar info : - "Slim" O-rings : 5mm (ID) 8mm (OD) 1.5mm (CS)
- "Fat" O-rings : 5mm (ID) 10mm (OD) 2.4mm (CS)
- Stock keycaps (Thin ABS - OEM profile) that came with my TKL Code keyboard.
A few comments :- 40A "Fat" O-rings combined with Cherry MX Clear switches seem to be the best for me. The travel distance of the keys is now really reduced without hurting the "feeling" produced by the switches !
- I was worried about the LED backlighting but it turns out that there is still enough light reaching the legends of my keys, even with the thicker o-rings.
I will not go much more into detail about my opinion.
There has been a lot of talk about o-rings (which are strictly equivalent to those I bought) and probably much more comprehensive than what I could offer.
CPTBadAss has done a great job by centralizing information on this
compendium.
I also
made a video yesterday trying to highlight the sound dampening and key travel reduction with some of those O-rings on Cherry MX Black / Red / Blue / Brown / Green switches.
Maybe this can bring some information - feel free to give me your opinion.
EDIT : Fixed some info.