i've got a 616f in mine now, works great except is very loud sometimes when reading original games and movies.. also when i put it in, i broke off some of the parts that the black bracket sits on and did away with the bracket all together, the drive just sits in there lifted up by some cleverly placed plastic items in there which i don't think will cause too much trouble as its been on for a damn long time like this now. i'm too scabby to make something that will hold it in there properly. it seems to be working fine
it also sits in there perfectly now and looks like an original box cosmetically from the outside now.
good luck with finding a drive and hope it goes well installing it