Inside, bottom half: The tan material is plastic foam cut from a boy scout sleeping mat.
Inside, top half: The pink material is cut from a foam kneeling pad and presses firmly against the bottom bow when the case is closed.
Bell & Plunger in case
Lower end in case: The bottom bow is firmly supported by foam material when the case is closed.
Left side in case: The valve tubing and leadpipe do not touch anything when the case is closed!
Case closed & latched: Both latches have elastic hold-down cords to keep them from popping open. (This is important.)
Back Side of case, showing web-belt handles and scuffing from 3 airline trips...