Question. The C300 doesn't work in my 17". Nothing new, known issue. However, some have stated that they have bought newer MBPs that do not have the problem and work successfully. I'm not trying to Optibay, I just need a working SSD. So...I have two options. Wait for Apple's Engineering to tell me they can't help me since it's not their drive (Which isn't SATA 3, thus moot), or sell this MBP and buy a new one. I'd rather not have to do that - but I do need my machine to work the way I need it to work. What I planned to do was check for a MBP that was manufactured sometime in late April or May and see if it had the issue using the 14-day trial period. If not, I return it and get my money back. If so, I sell the current one. It would also give me the opportunity to see inside of both and see what might have changed. But with the newer serial format, it's difficult to know what to look for on the box. So for those who: - Got a recent 17" MacBook Pro - Is using a third party SATA 3 SSD (Intel, Crucial, OWC, whatever) - Is NOT using Optibay Can you or will you share just the first six characters of your serial? NOT THE WHOLE SERIAL, just the first six. That will tell us if it came from Quanta, as well as roughly when it was manufactured. Want to see if there's an easy way to tell if they have April or May models or if they're still sitting on February/March stock (they don't have many MacBook Pro buyers).