hi guys, i want to start by saying the Flak 2.0( 009188-10) my first pair of Oakleys ever! So far i love them and like anything else i would like to customize them for me. i know i can change the ear socks but which lenses will actually fit in them ive looked at the oakley.com but theres alot of diffrent ones that are flak 2.0, 2.0 XL, XLJ...ect. so what the ones i need to be looking at? any help would be great!!!