Ultra costumizable pen holder

There are tons of those pen holder models on thingiverse, but as I discovered openSCAD, I really wanted to make my own version of that.
You can change many variables to fit your needs with that model. Exporting the STL, I have some errors when importing it to slic3r, but windows is able to fi the stl with its default 3D modeling app, so I suppose won't can easily get it fix anyway.