I just got my Ultimarc Ultralux pushbuttons in, and got some of them all hooked up. They look beautiful, and they are exactly the look I wanted. But they feel very stiff. In fact, so stiff that it is difficult to press them rapidly in normal gameplay.
The only thing I have to compare are what I presume to be standard Happ concave pushbuttons, that were on the original CP that I am replacing. Does anyone out there use the Ultralux? Are yours stiff too? Is it the spring, the microswitch, or something else?
I would consider replacing the microswitch with something like the GGG Micro-Leaf (someone posted that they do in fact fit), but I want to know if that will help things first. Does anyone have any suggestions?