View the video here and decide for yourself if it's something you're willing to do:
http://eshop.macsales.com/item/OWC/DIYIMM11D2/
I will note that the process surprised me a little bit, even after having experience with similar procedures on Apple laptops etc. For one, my logic board was in there tight, so getting it out as in the video made me nervous that I would break something before it started moving. But then it came out ok.
Also, the reassembly instructions had the replacement of some screws in the wrong order, and that got me in a pretty bad predicament for a few minutes. If you just reassemble in the opposite order that you took it apart, you'll be fine. Or just remember that the power supply needs to go back in
before the hard drive tray screws.