? not for this model, but for older; the top came off my meile s 3121 (old'ish). I can't figure out where the spring that's shaped like a sq. but is opened one one side (bottom) fits? I know the side go into the groves, but don't know where the piece w the spring go! I've tried a variety of ways it could fit, but would have to force the top (cobver) down...don't want to! THANKS!!! Holly