SilverfoxDojn - sounds like some of us might have offended you?? So Sorry - I thought this whole idea was a "Help" forum whereby each and everyone of us might possibly benefit from the vast experience of others?? Guess not -
Have a wonderful day, and remember - the big round part of the lens points to the front !

Whoa, there my man - be absolutely sure you know exactly what it is you are about to commence ???
Seriously, I have a Nikon 105-2.8 Macro which mysteriously stopped auto-focusing just a couple of weeks ago. Did all of the obvious (including cleaning the contacts) - no luck. Sent the thing to Nikon and guess what? Replacement of "major internal components" was required. Got the email notification just today that lens is A-OK and on its way back to me as we speak. It was a B2 level repair (major component failure). Plus, it is cleaned, recalibrated, adjusted, tested, etc. etc.
Just sayin'

Tried your site and it jerks you around by saying "first name not recognized" when you sign in. "Must enter first name" when it is plainly entered??