Here's my lapped Extreme and E6600. Took so damn long, I don't think it's worth it just for the few degrees haha. Got too damn tired towards the end and gave up. Couldn't be bothered to finish sanding out all the silver on the CPU so I left it like that. I used 400 grit then 600 grit and then 1200 grit.

I don't care about the shine cause no one is gonna see it.

I idle at 32/31 degrees in CoreTemp. It should drop more once the paste settles in. Time to start OCing