Spacer for Ultimate Guard Boulder Deckbox

This is a Spacer for Ultimate Guard Boulder Deckboxes that can hold up to 80 CardsWorks also with the Flip Boxes that contain the same amount of cards or other boxes of that typethe Idea is to minimize the amount of curling or “pringle” of the cards due to excess space in the Boxto make use of that space I designed a compartment to hold Dice or other small Items in the Box along the Deck the Spacer is designed to hold about 65 sleeeved Cards tight in the Box (Digimon TCG) but works with other TCG as well I would love to get some Feedback on what is good and what is bad about it and how it works with other games ^^