About X50's screws

[fravius]

Hi. I opened my X50 yesterdeay just to fix a broken piece of plastic inside. Everything workin fine now, but i have a doubt about the screws.
If you look your X50 from below you will notice 4 lines of screws and a semi-rectangular form in the middle (wich contains the mother inside).
The screw have 3 different lenghts, and i have a little doubt about it...
the first line of screws, the ones below the keys, are small... the next line (going u), how long are them? 2 centimeters or 2,6 centimeters?

Please, can someone unscrew and tell wich one is longer? (because when i had all the screws there was a little accident and... a lost the right order)


Thanks and forgive my english