Looking to add a new CPU fan to my 555 BE but am concerned with clearance on the PC-61. It's got an 80mm fan on the back and will not fit anything larger which makes me think it'll be a no go on something like a 212+. Any suggestions for a cooler that's a bit shorter? I know that the case needs to be swapped out but the rest of the upgrade has been stealth and a case change might alert the keeper of my budget.