Yeah, the Magneto is a great mech mod... of all the ones I own or have owned, those with magnetic buttons are my favorites... I really should get one out of mothballs someday and fire it back up?
I really liked my Copper Penny, but it had a spring-fire-button... so I ordered the magnet conversion for it, lol... the magnets are the only parts of it that aren't pure copper now, but the button is 50x better... and it wasn't horrible with a spring to begin with!