I really liked @artolindholm_2099376's character board, this is exactly how I would have made it (so thankyou that i don't have to bother) however its way too thick for me, uses too much filament so this remix just reduces the height by 50% and then I trimmed off some extra layers on the cutout which weren't needed.
After printing myself it appears the big part in the middle is slightly too short which would have been present in the original print.. but no worries, once you push the skill cards in its all held in fine so I'm not stressing over fixing it
The author remixed this model.
Reduced the height by 50%
Made the height of the cutout section the same amount of layers as the base layer (so on my printer this was 6 layers for the base layer and a further 6 layers for the cutout, this is more than enough to fit the cards in)