Systems and methods are involved with a case assembly a side; a cushion member including a side portion extending along a portion of the side, the cushion member including a first surface, a second surface, a first thickness extending a depth from the first surface to the second surface, and at least one trench having a depth from the first surface partially toward the second surface without penetrating the second surface. In addition, other aspects are described in the claims, drawings, and text forming a part of the present disclosure.