Doing the swap myself. I'm fairly new to the site but here's some advice. Listen to these guys. They know their Z's. Listen to them and you will get to know yours. This forum is probably better than any shop you can go to. They aren't here to take your money. Just true enthusiasts doing what they do. I've monitored this site months before I became a member. These guys are the reason why I decided to do it myself and not let the shop screw it up.