Zombicide - all Seasons - Boardclip

i like to play Zombicide, but if you hurry up, you play crazy labyrinth because the board would shuffle around.
for this i designed a simple clip for the board to stop moving around
on top of the clip you can insert the
exit, or the breeding zone witch also dont move around too.
i printed it for the details with support, but i think you don't need it
i just maked a quick board construction to show how it works
it's a snug thight fit to hold it in place but it would remove easyly