Someone tossed away three laptops because they couldn't get them working, tossed them my way to fix them and keep them if I could, which I did, but I'm wondering whether it is worth it to upgrade them with a (small, cheap) SSD and put in an internal blu ray drive to make them essentially portable blu ray players. One is a Samsung 300E, the other is a Toshiba Satellite C55, and the third laptop is circa 2005, I may not even bother. But I know that drives come in three form factors (7.5mm, 9.5mm and 12.7mm) as long as I match the form factor, is there any other obstacle to compatibility?