maybe you could do something like use screws to mount the drive to rails like what i have here,

then goop the rails to the old hd bracket.

then its removable. I always try to goop the drive to something so the drive is removable.

A little does it, if you use a little goop and wipe off the excess you would never know goop is holding it to the old hd bracket.

i have a couple extra aluminum rails if you need them.



and the drive is getting the extra cooling it needs.