I would think that 512GB is more than most have I'm kidding of course, I know what you mean
ok.. let's see how far we get, unfortunately I'm leaving tomorrow, so I don't know when I can continue (but I will be back in two weeks at the latest).
So we have removed the hard drive and the first stick of RAM. Remove the two screws on the modem and disconnect the modem. Also remove the battery. Then remove the final cover, which covers the wifi card. It is to the right of the hard drive. The screw is on the right side of the cover, roughly in the middle. The indentation to remove the cover is directly above it
The wifi card has two antennas connected to it, they are at the top of the wifi-card and connected with two small screws. disconnect the wifi card from them, then take out the wifi card.
Next you need to remove all the screws remaining in the bottom part. If I counted correctly there should be 15. 3 in the top right corner, 3 in the top left corner. 4 just outside of each corner of the harddrive compartment. 1 centered below the wifi-card compartment. One on the right side of the wifi compartment just above the indentation, where there is an edge. The remaining 3 are distributed along side the right side of the laptop.
Then disconnect the two cables on the modem bay (This is in the compartment just below the battery, at the very top of the compartment).
Next is the screw that keeps the dvd drive in place, it is just below the latch that unlocks the dvd drive. After you removed the screw, you should be able to remove the dvd drive.
Now it is time to turn the laptop around and open it. Next we want to remove the keyboard bezel with a flathead screwdriver.
Start at the right hinge of the screen on the laptop body and locate the speaker. Move to the left from there, you should feel that the cover is split into two parts there: a smaller one towards the keyboard, a larger one towards the screen. The smaller one towards the keyboard is the bezel. After that remove the speaker covers on the left and the right of the keyboard as well. They seem to have two hinges, one left, one right each in the middle.
Now it's time to remove the keyboard, there are three screws that are holding it in place, that were under the bezel before. They are roughly equi-distant. There is a fourth screw on the left, that does not belong to the keyboard, but rather to the band containing the power button.You will need to remove that too (but it's possible that this can only be removed after the keyboard was removed. So I would do this step last)
The next step says to "Remove the keyboard mounting bracket.". Unfortunately I have no idea what this is supposed to mean and the picture gives little indication too. The best I can do is describe: The two outer screws are seemingly fixing the keyboard directly, while the screw in the middle seems to hold something that is underneath the keyboard, this may be the bracket or not. So I can't really guide you there, it looks though as if all things are loose and you should be able to lift the keyboard out now. The connector to the MB sits at the bottom left end. The entire left half underneath the keyboard is covered by a plastic film. It has a hole where the MB connector for the keyboard is, but said hole is covered by an additinal plastic latch. It may be hard to find.
Once you have disconnected the keyboard and the band containing the power-button, you should be able to remove the plastic film. Next we need to remove 3 screws. Locate the connector to the keyboard again, if you move along the top side of the compartment, you should feel a hole roughly in the middle. Move up from there and you should find the first screw, move up a little further and you should fine the second screw. Follow the outline of the cover to the right side of the compartment and you should find the third screw, again roughly in the middle of the compartment. Remove the cover and you have reached the second RAM stick.
I'm not 100% sure where the CMOS battery is, but I think further disassembly is needed. Unfortunately it's getting late for me, so I do not have the time to write this out now. We can do this once I get back.. Or maybe someone else is curious to take on this challenge