This weekend I dropped my th400 pan and hammered out the dents and plated the bottom and installed new filter and re-installed. Get to shop this morning and that round magnet is on the bench. Apparently I forgot to put it back in. Really hate to have to drop exhaust, pan, fluid, etc again to put it back in. Do yoy guys think if I superglued on of these super earth magnets to outside of pan it would work the same as the one inside, until I have a need to drop pan again?