Hey Steven! This is all wrong! That's not the wright order: actually the top panel is the first part that can be removed, you don't need to tear down the rear panel and the front handgrip.. (it also may cause the damage of the rear panel!).
So, in order to remove the top panel just follow this order:
STEP 2
STEP 5 (Just the upper screw (not that one between HDMI and USB port)