Hello:
I have used several of those 9700 coolers and you can move the cooler slightly, because that clamp is only a spring type clamp. Don't worry about that. The thing you want to watch is different core temps with a program like Core Temp. I had a problem with the weight of the fan sagging slightly and two of the cores were a little bit warmer than the other cores. Not much you can do about it, I did end up using a thin long wire tie between the cooler to the case to hold up the weight and it seemed to help.
Ed