Thanks for the thought, but my question is whether the magnet would adversely affect the ignition module...???

I have used button magnets for large scale hatches before and they work really well as long as you have magnet to magnet contact. Magnet to steel (washer) is not strong enough and an abrupt negative snap will sometimes pull the hatch off... It's nice to be able to pop the hatch each time you fuel to see what's going on, and on-lookers come over and ask... how 't heck did you do that??

Ron