The last thing to do before re-installing the pickups is to unscrew the bobbins and re-wrap them with the protective ribbon. Before screwing the second bobbin back on the backing plate, jam the wax-impregnated felt damper back between the bobbins. As you tighten the second bobbin to the baseplate, it will pinch it in place. Place the chrome cover back over the pickup and solder it back in place. You may want to add some dampening material, like a thin piece of rubber, between the cover and the pickup to help reduce microphonics from the cover.