here is the link: http://www.n54tech.com/forums/showthread.php?t=5029
pictures on page 3, 4 and 8 i think. i am not putting in my car a set of turbos which will at some point have wastegates issues. only removing and installing the turbos has a steep price involved.
Also it seems that MT cars suffer more than AT cars of wastegates problem. at least all people i know that were forced to change turbos had MT. i have not this issue. only at start up you can hear them but otherwise i have been pretty lucky.