How thick a pad are you using? When I moved my Dakine "tube" pads from my 100 to the 200, all fit fine, BUT when I raised the rear hatch the air dam/spoiler/tail hit the board - and on bumps, smacked the nav shark fin.
Excellent 40, btw, and your backyard looks awesome!
Ha ha. In reverse order, thats a boat landing near my house with the 200, not my backyard, and the 40 is at a lot I lease to keep a boat (no house on it). I had to sell the 40 because I needed to buy a car for my son to drive. I was using the same pads as you, and you are correct, the spoiler hits. I have not had the issue with the fin. In fairness, I have never driven more than a few miles with the board on there. I live on an island.