I'm a bit worried that Chase will extend the 48 month rule before I reach eligibility (in January). I don't expect to need SR or SP until about March, so I am contemplating a PC to Flex. If Chase does pull the sign-up bonus rug out from under me by extending that rule, do you believe I would be able to PC a Flex back to SR (or SP)? Failing that, would there be any problem PCing a Freedom Unlimited to SP? (In that case, I'd probably apply for a new FU because I would still want one, and get its sign-up bonus as a consolation prize.)