Guess I just got lucky the only time I've needed to remove my back panel (only had the laptop for 5 days so far). Went back on without a hitch in about 20 seconds. What scared me was pulling it off in the first place. As hard as I had to lift it to get the tabs to release, I was afraid something was going to snap off, LOL. Maybe I was doing it wrong. Makes me wish both fans had their own small access panels. I don't want to be removing the large panel any more than I have to.
Sorry I'm no help. Hope someone comes along with a good method for getting the panel back on.
ASUS G75VW
i7-3630QM 2.4Ghz
GTX 660M (2GB)
16GB DDR3 1600Mhz
1TB HDD
2TB HDD
Blu-ray Writer (Pana. UJ-260)