Which led me to try operating my Orbit with my thumb. It was a huge disappointment. Movement speed was abysmal. You see, when using fingers, I usually use three: index, middle, and ring. If I want to move the cursor far away, I'll just roll all three over the ball. Nice and easy. But with a thumb-operated ball, I can't do that, I only have one thumb per hand (and frankly, I don't mind that). So if I go down this route, I will need to build it so that it can spin more freely, to allow me to cr...
