Have lapped my Q6600 and the nb-block( a little better, have to work more on it)
but i had 68-68-62-62, and took of my Noctua and i saw that the hold-down for the cpu are little taller then the cpu:P
So i took that of, and the Noctua( i use push and pull ) on again. With 1.4v on vcore i get: 60-60-57-57. Before the lapping i had around 70-70-65-65
Will oc tomorow and see if i can get a lttle higher=)