Here are some pics of how I did it. I screwed up the cut on the 3 inch baffle and needed to over hang one of the prongs as you can see in the first pic. That one is a 3 prong T nut instead of a 4 for that very reason. I had trouble getting through the 3 inches from one side so I had to turn it over and cut through the other side to get the circle out. It's not perfect but I think it will do. I set the epoxy and tomorrow it will be cured. Then I'll test fit the driver inside.