Generator quieting

I have looked at your pictures several times and appreciate the temperatures you gave me in another thread.

I am experimenting with duct board doing this and it just about has me beat trying to shape it around the exhaust area and am thinking about Soundown for that area.

It appears that you put a 1/2 inch plywood divider there with the soundown facing the genset as a gasket, is that correct?
Thanks Jim