just some findings on opening up my MBP 2.53 Unibody after my superdrive died in my new unibody apple sent me a replacement Macbook pro. unfortunately the replacement arrived with a wonkey on button. i took the opportunity to open up both notebooks and swap the on button rather than get another computer sent to me. while i was doing this i noticed they appear to have changed the sort of super drive used. my first unibody (october) had an: Unbranded HL-DT-ST DVDRW GS21N Firmware SA15, made in korea my second (november) has a Matshita DVD-R UJ-868 Firmware KA14 this second drive appears to have (under "write strategies") the added ability of CD-Raw in the list of formats (whatever that is). The drive is branded as panasonic and made in china the only other difference is that the new drive is a fair bit quieter and quite different to look at. the swapping of the on button isnt too hard, i see a few people seem to have had a button that sits a bit low in the body of the notebook. just under the button is a little spring that on my replacement notebook didnt push up hard enough. also the symbol on the face of the button had been printed skewed. i really dont know how these things get passed quality control, LOL.