I use a lot of Dzus fasteners, especially on the laydown enduro where the body covers almost everything. If you have trouble with them falling out....you either have the wrong length, or you need to adjust the spring...and they make a tool for that. I made a template for drilling the holes. I took a 1/4" fender washer and used the center hole for marking the center, and drilled a small hole on each side to mark where the spring goes. If they're installed right, they won't come out. I used them on all my Sprint Car panels and hood, and they don't get much rougher treatment than that.