Product review (4 stars): Works and Fits Perfectly, Doesn't Include Metal Retention Ring
Everything fit and works perfectly.  Only lowered by a star because there is a small rubber gasket that is referenced in the instructions (so it's clearly supposed to be there), but isn't included in the kit.  This wasn't a problem for me, since that part didn't need to be replaced, but it's the only part of the whole assembly that isn't included.  It just seemed odd.