I just wanted to mention that recently I did two E2 grip upgrades to my P226 Elites. I bought the grips from one of our partners (Top Gun Supply) and received fast shipping and they have good information on their website to check your main spring housing before you purchase. The install took about 5 minutes and the grips feel great. I know it sounds crazy, but the nice Sig wood grips are just too nice to shoot all the time and are fat too boot.
Anyone who has contemplated doing this upgrade I highly recommend it if you don't have huge hands.