I fit the bottom canopy, which, as expected, hits the radiator and oil cooler and then measured 3/8" around the opening, drew the line and then cut away that much using a Dremel tool. I couldn't finish the cut as I'd promised Carolie I'd take her to lunch at Holman Table at the downtown St. Paul Airport (it was delicious, by the way.) Expect it to be a very nice fit once it's cut and sanded.