Just like having your car serviced before a big road trip, I like to do the same with my camera body. We’re heading off to Africa with Images in Africa Safaris shortly for ten days of amazing photography. The last place you want your gear to go down is in deepest Africa when the killer shot is in the viewfinder. So the D4s went in for what is called a CLA, Clean, Lube and Adjust. Two things to be sure you do before you send it in … first … make sure you have the current firmwares installed. Second, copy your settings to your card. The reason for the 1st is so when you do the 2nd, when the camera comes back #2 still works. If they update your firmware for you, there is the possibility you will loose your settings even if you copy them to a card. Keep in mind that if you do loose your settings, you can start over using mine as a starting point. The last thing is to do this in plenty of time BEFORE your trip! Because you want to get your gear back and put it through its paces before you go. Make sure all your settings and everything else are doing what YOU need them to do. It’s a simple thing, but I think it’s important.