Replacing the screen assembly - can Apple tell?

Hello,

If one carefully replaces the screen assembly for the rMBP Pro can Apple tell if the whole screen assembly has been replaced? There aren't any seals or stuff like that inside and you basically change the whole upper body of the machine so I wonder if Apple is able to tell. What do you think?

I've had extreme bad luck with my rMBP (first the screen cracked and then the screen assembly I replaced failed after a few months and there'd still be "warranty left" because Apple doesn't know that I've cracked the original screen). I wonder if it's worth to try?

Thx in advance,

- J