I'm very interested in trying this out (might have two fully operating cameras!) but really got lost as soon as you started using electrical terms. I've been tripping the shutter with a screwdriver, pushing on the piece that looks like the "pin" part of a lapel pin on the side where the rewinding knob is. I assume that's the right area, but I'm not sure what piece is the armature and what piece is the magnet. Appreciate any guidance on this one.