I just got my cap set today and I am so glad I took the chance. I like how I can customize the direction of keys if I wish to what I think would be the best feeling (at least until I change my mind). I did buy a set damper rings from WASD Keyboards (40A-L, aka the red ones) and would like to relay a discovery to anyone who has done the same. For the record, I am using MX Clears.
I found that the 2x caps would still clack a bit even after I had put a ring on each of them and set them down, as well as the top outside corners (R4 x 1.50). My solution was to put 2 rings on the main thumb keys and 3 rings on the R4x1.50.
If you are using thicker rings, you may find that this is less of an issue.
Rolz73Good to know, thanks.
I'm still waiting on my ErgoDox (it's being assembled) and have o-rings waiting. WASD changed the colors of the o-rings some time ago, the recommended ones (40A-R) used to be red, but are now blue.