I've recently jailbroken a fat PS3 and I'm interested in putting a bigger internal hdd inside it. I have another PS3 which is the slim model and it's not on CFW. The slim PS3's hdd is 300gb and I want to swap that with my fat PS3's hdd which is only 80gb. I wonder if I can just swap the hdd, format it in the boot menu and install the CFW then use it? Is there a risk of losing my CFW on the fat PS3 by doing this? The slim PS3 is on OFW 4.81. Any help would be appreciated.