The original bases from Dakanzla are hollow, I wanted flat underside to the base to be able to glue on felt for a nice finish of the tiles. I just added in 0.5 mm (5 layers @ 0.1mm layer height resolution) to the underside. This should not interfere with the assembly of the finished tile with magnets and landscape.

https://www.youtube.com/watch?v=xtjiwE4k6zA