I have quite a few of my Hex Bit Organizers - meaning that i have way too many hex bits.
I needed a way to store them somehow.
I built this little tower.
This first model has 60 mm pillars, in case someone has large bits/holders etc.
The model can be printet without supports and will come out just fine.
I printed mine with 20% infill, but you could probably go with 10-15% and be just fine.
The pillars are 11.5mm in diameter and the holes underneath are 12mm meaning that they should fit just fine.
If you want ekstra stability, put some superglue in.