This is a remix of @Rettocs_2003003 D20 holder using the Standard D20 scaled model.
While perfectly functional, I find it's overall size is a tad bloated especially when placed on my Borderlands: Mr Torgue Arena of Badassery (MTAOB) cards ~ where I decided to use a D20 to track boss/unique enemy health (instead of the game's wound tokens).
So I basically cut down on the sides and even gave it a bit of a concave edge while at it. The result is smaller footprint on my cards ~ which I prefer since there's a lot of details on some…
While of inconsequence as these are such small print, the end result requires a bit less than 50% of the filament of the original model…
The author remixed this model.
Shrunk the model - without changing the dice bed - in order to reduce the overall size and fit...