When you move all your model boxes from one large storage box to another seemingly larger storage box only to find it is actually a tad smaller than what you had before......
Maybe its a Tetris thing, you need to turn, twist the boxes in a different format to fit them in. Either that, or the old box wasn't blue with 'Police' written on the outside was it?
Big Ikea storage boxes, ironically the old boxes were Ikea packing boxes for some cupboards bought years ago that were strong and at 90 degree angles - these storage boxes stack so are narrower at the bottom.
Still thinking this one through, not been the best of days for changing things.