While that is true, you can use taller materials to prevent that from happening. (It would reach up to the top of the case when closed) If you did this, it would be fine, and since when do you shake your XMODS case intentionally? LOL
Thats why I put that in the notes...it's cheap, so it's not perfect, but it works fine as is for storage and separation of parts if it's permanent storage your after. Thanks for input.