I have an LX7 that requires the cap to be removed before powering-on, which is annoying. So I've investigated the use of an auto lens cap, such as the one linked below: http://www.adorama.com/LNCLX7.html Do these work? As in, does it protect the lens from damage? Is the protection minimal, good, or excellent? Do the flaps ever accidentally open? I've seen these on various models other than the LX7, feedback from any users is appreciated. Thanks.