I'm going through the same thing with the AT4047- the bands are scraped
each time it's installed or removed, slowly they were loose enough to
let the mic slip through.
I'm about to order this clamp style, similar to what came on my ADK
that is quite secure.
http://www.musiciansfriend.com/srs7/.../base_id/54844
There are several sizes, and through some cross checking, their #57 is
hopfully the correct ring size for the approx. 2" AT bodies.
Wayne