New screws found when removing optical drive

Hey, I just got the new quad core MacBook Pro. I want to take the optical drive out and replace it with an optibay but while I was performing surgery, I found I couldn't remove the optical drive as the 3 Phillips from the last version had been replaced by what I believe are Torx T6 screws. I just wanted conformation on this before going out and buying a new screwdriver or if I am wrong, info to get the right thing.