There's one thing I should mention about the poster putty approach. It's perfectly safe to do, and will let you get a feel for the sensitivity of the mod and decide if you like it or not, but over time, it's very likely that one of the installed risers will slide out of place, making you have to open the thing again. If you eventually decide to glue them to keep them from coming loose, I'd recommend you look for a bottle of Krazy Glue that has the brush applicator inside the cap. It's super easy to use that stuff without making a mess. Just swipe the back of your little cutout, and drop it in place. Adjust it with the tip of a small flathead screwdriver before the glue sets, and then press it down nice and flat.