The author remixed this model.
Thanks for creating this boss stand in the first place!
I've extended the base plate such that the color-printed card board hexagon shipped in the game's box will fit neatly underneath. I was afraid that the original boss stand would easily slip off the card board hexagon, especially with kids playing the game.
I've printed the modification with PLA, 20% infill and a support (essentially filling up the empty space for the cardboard hexagon).
One might try to print it upside down, again with support.