Hey. Can I ask you guys I will buy a Macbook pro very soon and watched some optical drive replacement videos on youtube where people change the optical drive to ssd in macbook pros. I just found 2012 or earlier (2011. 2010) non-retina models which they did. My question is: is it possible to change the optical drive to ssd in newer (like 2013) models with retina display (or non-retina) OR 2012 models WITH retina display? I don't know what is the difference between retina and non-retina models's inside in macbook pros. Maybe Macbook pros with retina display not able to replacement? Thank you for helping!