Stacker for Bambulab refill boxes

I wanted to stack my boxes of refill in a nice clean way and came up with this idea. The beam gives it a bit more stability and keeps the shape of a square. It's best to tack it with a little bit of glue since it doesn't really stay in position without. If you are not interested in the support beam. I've added the 3mf file for a version without the beam, so it has no cut out. Don't forget to enable support generation. Boost MeI'm trying my best :'(