I'd *love* to try this out, I missed the beta, so no free trial for me for ages... and I'm not about to shell out 50 bucks for something I may not like ... ;)
This guide shows you what many players call the "Sweetspot". You hit where you aim alot more often. It should work for most people. Before doing this, you should tweak your graphics settings to make the game run at a constant framerate. I'll just say that you need a consistent framerate to use...