I'm a big fan of the Logitech M570 (it's a wireless trackball that uses their proprietary dongle that still somehow doesn't work with all their wireless stuff), and I was wondering if there had been ...

So I'm sure many of you are familiar with this trackball mouse. Now when i first got this mouse a while back, it took a while to get used to as oppose to a regular mouse. Also because i have 2 ...