Using the ones for the 1150 socket. They turned so easy with a screw driver after using thumb. But its still tight. But think damage is done. Didn't think the screws were so fragile. Still seems to be cooling fine though. The thumb screws turn, and get tight if I try to turn the other way. Then go back and they get tight as well. With just a little lose inbetween. Should I just try to get a new backplate and replacement screws?