Attention: I think one step was missed out. The step involving removing of the power switch, and there's a ribbon there. So if you follow through and did not remove the power switch screw and ribbon and proceeded to rip the plastic plate off you may tear the ribbon off from the power switch!!! Which I did! T_T

To add:

The RAM door is not symmetrical. When putting back the RAM door, it should flush with the back. In STEP 1 photo of the RAM door it seems the RAM door is not fully flushed and aligned.