Fitting CPU coolers for LGA775 boards is a right pain in the rear-end. Both times I have had to fit coolers I have had to apply more force than I feel comfortable with and get scared that the motherboard is going to break. I know it's suppose to be easy with those twisty pin things but it's always so fiddly trying to get them to work.
Socket 478 was a doddle in comparision.
Socket 478 was a doddle in comparision.