Looking good!
As long as you are getting dusty, go ahead and grind & rough up the upper half of the hull inside of the tray to throw some cloth there also.
Its really thin metton there and w/o the hard expanding foam inside you'll crack it landing on the side.
Take a block and sand the tray foam smooth & I would suggest to do the lowered tray like the superfreak. You'll end up with a hump in the middle for the pump cavity. trash the stock tray floor and lay it up super thick