looks good, nissanguy.
on my install i just made a gasket that fits around the perimeter of the HU using black hard felt.
most art stores like michael's, joanne's sells them.
i cant tell in your pict, but if you still have the very thin felt-like oem gasket on the factory bezel, removing it will make the install look cleaner too. i used RC car motor spray to remove, you can use googone or WD40 or watever you got in your garage.
removing the bezel will make the work go faster.