1.5 hrs. on the interior last night.

I found that pre-shaping it around the bends before you put the glue helps because the carpet stays somewhat bent.

Glue on and it sticks quite well.

Test fitting and trimming the larger pieces.

Top piece test fit.

Ready to cut the soundproofing to size.

Ready.

This is a different piece, but here the glue is on and ready to stick the carpet.  Like my pattern? 😁

And it's stuck on!

Side view of the carpet/soundproofing.

And in place after peeling off the backing.  From now on though I'll wait until the glue is dried before putting it in place.  You can see I got a little of the still-wet glue on the carpeting for this piece.  Should brush out though once it's dried.