I got the scoop mounted today..not to happy with the bolt on tabs but we made due. I used 20g aluminum for my base and folded a 1/4 inch on all four sides to give it some strength. I didn't want to copy your design Spaz so I made up a round flashing that slipped into the hole in the hood and covers up the gaps in between the hood and the bracing. This flashing comes down to within an inch to 1 1/2 of the pan so I don't need the foam to be that tall.
Just another option....
AL
