perhaps I became accustomed to using my forearm for moving the mouse instead of my wrist. I love the feeling of a mouse passing over a large surface area, its very pleasing/satisfying/borderline eroitic. One thing about the FK1 that annoyed me, at first, was the mouse "bottoming out". HAve you gotten that at all? The mouse feet are far too shallow, and they allow for the center of the mouse to catch the cloth of the pad if you even press down on it slightly.
Now that I have used it more I am much more used to that feeling.