not very in all reality
there's a single screw you will have to remove. can you upload a picture of the g55 with the back cover off for me?
And ill try and point it out.
G75vw DS71
3610QM I7
16GB Ram 1600mhz
750GB+120GB(patriot pyro)
Nvidia gtx 660m
Purple Keyboard mod
Proud Owner of a GTX 660ti DC-II