Well, this is new. We're momentarily stumped by the new, extra-secure lower case, before we crack the code to remove it.

A suction cup helps lift the lower edge enough to get an opening pick in, to pop hidden clips on each side. After that, you slide the entire lower case down and you're home free.

All of the extra clips and hooks help the lower case serve as case-stiffener, in lieu of the normal amount of screws.