Customizable Pen holder

I really like the simplicity of the cubistand pen holder (http://www.thingiverse.com/thing:1294085), but I thought I could like it better if I could adjust it to have more or less holes, and why not, decide the size of the hole. So I went ahead, and modeled it on openscad, and here's the result. You may generate the following pieces with this cutomizer:
Cubistand_main.stl
Cubistand_base.stl
Cubistand_rod_cap.stl
Only you will have to make your own rod

Corners look weird on the customizer