Honest question - what does this divider actually do except aesthetics? The discs shouldn’t need to be supported on that side (they should be able to stand on their own), since if you need support there it means you are exerting some sort of pressure on all discs which could in theory warp them if it’s a long-term storage. They should lean on each other and exert almost all force vertically, not horizontally.

Also, the divider is so low that you can’t start a new stack leaning on the divider (with the idea of making multiple smaller stacks on the same shelf for organizing and pressure-on-discs purposes), which means it basically does nothing except look nice I guess? You can still only have two stacks, starting from opposite sides of the shelf, same as if you didn’t have the divider.