My grand daughter wanted a box for her looms to fit into another box where she can staple them.
I made a configurable box which receives some parameters and creates a nice box to sort in whatever you want!
I changed the thing now and added a radius parameter to create round inner edges as well as the outer wall edge.
The hard edges collect too much dust and it's not easy to grap small things in there.
If you set r = 0 the there is no rounding and you get exacly what it was before.