You are done with the heatsinks; time to move on to the lapping. Read the article about lapping on AGN Hardware then realize that guy is way too serious about it and you want to go to bed tonight. 

Moto showing how NOT to lap a CPU.

Since this is a PPGA project there are a few things you might want to do different. First of all, static is a deadly disease, which is contracted by things rubbing together (which Moto seems to have forgotten in the above picture). To protect my CPU’s from this I jammed them into pieces of anti-static foam, to make a kind of sanding block. 

Anti-static materials actually conduct electricity so that no charges can build up across the pins and blow anything up.  By plugging all the pins into conductive material I am shorting them all out so that no pin-to-pin discharge is possible.  I wrapped the CPU’s and the foam block in electrical tape. This should be a bad idea because electrical tape is non-conductive and would hold a static charge, but, like I said earlier, the pins are all shorted together so -- no problem.

Next page: The results