I have an arrester-less ms261 muffler I'd like to use for a rebuild. The fire risk here means I want to and must add an arrester. This muffler never had an arrester, so it's an add, not replace. There are tons of threads about removing arresters, but I seek suggestions for adding one. I'm more interested in reliability and effectiveness, less motivated by appearance. My initial thought is to enlarge the exit hole a bit, then cut a piece of screen that will fit tightly under the deflector and secure it with a screw. If I go this route (if no one proposes a better alternative), what is the best way to secure the screw so the screw does not vibrate loose?