I didn't like the tail wheel access cover that was supplied with the kit because it was ill fitting and just a flat plate. I had read about several other kit builders that had a carbon monoxide problem when they started flying and traced it back to the ill fitting access cover. So I made another one that fits a lot better.
I used the original to get me close on the size and shape. I got it cut out and bent up on the brake. Deburred and sanded all the edges. I set the rivnuts for it and mounted it temporarily to check fit and finish. I took it apart to let the LocTite 680 Retaining Compound cure overnight. If I don't remove the screws they'll bond to the rivnuts. It doesn't take long to become a real problem. I found this out on some of the early rivnuts I set for the floorboards. I had to drill a couple out and replace them. :(