I guess I've been lucky, never had a defect of any kind on any leupold scopes. I've read on other boards that the hard turrning power ring is a comon problem. Send it in, they'll fix it. 4-5 weeks sounds pretty long for leupold. I've sent in scopes a few times over the last few years for custom work and its never taken longer then 2 weeks to get it back. About a month ago I sent in 2 scopes for turrets, had them back in less then 1 week.