Storage box for soldering tips

Simple box to store up to 12 soldering tips.

My tips are compatible with beloved 936 soldering station. They are <7mm in diameter and <45mm in length. 

Orient it flat on the print bed (rotate the lid so the slanted rail is at the top). 

It worked for me with 0.2mm layer

I am also sharing my FreeCAD file if anyone would like to improve it.