But I hear it's not too great if you lap too much. Some say it's better to not lap to a mirror finnish and have the thermal paste fill the gaps. But then again, who knows... I guess as long as the surface is flat with the heatsink, there isn't much to worry about .
one thing i didnt do was start all the way with 400 grit to 2000<<(takes off alot of copper) i went from 1500 - 2000 had to rub hard thats all .then used compound. and there is still a few lines left u cant see them though only at certain angles but still looks sharp
one other thing in an abitic7 max3 mobo the heatsink install the wrong way( fans top, n bottom) compared to the instruction so the air pushing down instead of out towards the exhaust(side to sides). vbgz