Mikee, I just installed the FOP32 Monday in the same setup (CUSL2-C, 700E cb0). If your motherboard is not already installed in the case , it's fairly easy; however, if you're replacing another heatsink/fan and don't want to dismantle your setup, the confined area makes installation a little tricky. If you take your time and exercise care, you shouldn't have any problem (did I mention take your time); in fact, I found the original Intel heatsink/fan that came with my retail 700 much more difficult to work with. I don't know if my method is advisable, but I used a slot screwdriver, inserting it into the clip and pushing down and pulling the clip outward until it snapped on. I put a rubber pad on the motherboard in the area where the screwdriver would contact the motherboard if it slips off the clip (which it inevitably does). Perhaps a member who does this a lot can recommend a safer procedure. Good luck and please let us know your results.