Ok so, since you guys are name dropping, yea Derek! He's a certified Nissan GTR technician. So, as the cert implies, he's the one that does the work on all the GTR's when they come in. And on the side he has a few Z's of his own that he races; so basically he knows what he's doing.
Edit: not sure if you plan on going there...but i'm going up there Monday morning for some work on my Z. PM me and i can introduce you if you want.