try to get a rough one but not to rough. the best way that i found out to make a perfect circle is to take the silver ring off get a drill and drill holes between the door and the psp logo and once done just snap it off and then just sand away and your done. works for me. oh btw this will only work with oem doors not the cheap 3rd party ones. if you need hlep just pm me or message me on msn aite! =) i like your mario and bannana lol