I also have a MX510 mouse and im now finding that im getting pain in my middle finger when using the mouse.
Perhaps its the size of the mouse or something, even though ive had it for a couple of years, its only been causing pain in the last few months so thinking of changing it.
Any major differences between the Razor Diamondback and Deathadder, other than the price? I dont game that much, mainly use in windows.