Actually, you can break it (as I found out, to my chagrin). Lower left, lower center, and along the top are all 'barbed' retainers which do pop out, when pryed. However, the lower right is not barbed, but 2 square retainers. The squared retainers will snap off, if the other barbed retainers are not pried first. A little crazy glue resolved the damage I caused.