Got both red 40A-L and blue 40A-R rings. Mechanicalkeyboards.nl send me one package for free, super happy about that!
Now I tried blue o-rings on my filco cherry mx blues and it feels amazing! I regret that I didn't mod it earlier, it feels awesome.
Red o-rings installed on my Poker 2 with red switches, and it definitely feels better, but overall red switches feels kind of cheap for me, dunno why. Cherry mx blues are little bit too hard for me, and reds are very light which I like but they feel very cheap. I think cherry mx brown would be perfect for me how do you think?