Ok! It's in. Pretty easy. The second deadening changed some of the fitting dimensions. I think. Tightens everything a bit. Two of the quick slips failed to line up with the hole.
(The clip was too long over all. The bend engaged the box and it pushed the cip hole off center. I'll figure something out, so no worries for you. Without the sound stuff it probably would have been easy.) Nice product. Thanks.