Sugestion: 1) don't take both sides of the Doublesided tape off til you line things upand have screws in the board. 2) Don't freak out if it don't line up perfect. Just put the screws in with it back from the motherboard, and tighten them 4 turns on one, move in a cross pattern, 4 turns on that one, move beside it, 4 turns on that one, move across, 4 turns on that one.
Keep doing this til right b4 the foam touches the board, then push it to the board to make sure it lines up, then pull back and remove the cover off the foam. Then and only then do you put the pump in, get it in the slots, then finish tightening the screws. *Be careful not to overtighten and snap your board!*
Just chiming in on this. It's an old post.
I don't think you can over tighten the screws. I must have turned them 10-15 times expecting them to stop or tighten more than they did. Aren't the screws smooth at the top? It's been about a month since I installed it but that would explain why they never passed a certain strain.