These movement trays are very similar to Games Workshop's 25mm base movement trays. I'm using these to play Saga, a tabletop miniature wargame.
...Show more (https://www.grippingbeast.co.uk/Saga.html)
I used a different cylinder shape to make the holes in the improved version. The older ones used the basic shape and it has a limited number of edges. This made it not a true circle which caused problems with bases that were a little more than 25mm in size. The new "true" circles should handle those a lot better. Also, the improved trays have more options on sizes.
I hope that everyone that uses this design knows that they can separate the bases in Repetier or Cura and print just the ones that they want.
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/if9M59TWUUe