Has anyone on Techspot installed a ASUS P5A2-8SB4W heat sink. I have always used the retail coolers that come with the CPU but planning to install one of these on my new system. I have read that there are no instructions that come with the cooler. Does it take a tool of some kind to fasten this cooler down to the back plate? It seems like the cooler would push the back plate off when placing it the CPU to fasten it down.