I have a vertex .16 and there is a screw that is totally stripped on the back plate and I can't get it off. I was checking for rust because its been up in storage for a long time without after run and I wanted to clean it up. I tried everything to get it off but it still won't come off. I left it outside with the carb taken off on a chair and one of my dogs knocked it off and it fell into the mud and totally drowned in it. There was some mud that went inside so I took WD-40 and drowned it in it so it wouldn't rust from water. How am I supposed to get the mud out if I can't take the screw off? Should I just consider it trash now?