To be used as a devider in the 2 levels Ikea trofast box insert.

At the moment the model is only for the top level.
It can't be used in the bottom level.

I've added too little tolerance (1mm gap)  and it could be a bit lower (1 mm).
Wil be working on a new model later

This is horizontal split variant derived from Ikea TROFAST box insert (2levels)

That one is also remixed from the Ikea Trofast box corner insert
There is also community model for the middle gap.