Towel hanger (parametric)

Tired of picking up my towel from the bathroom floor I went for a search on Thingiverse. During this search I stumbled on an IMHO pretty nice looking and useful towel hanger, thing https://www.thingiverse.com/thing:590913 . But the sizes didn't exactly mach my towel hooks, so I decided to make a new version from scratch with OpenSCAD.

When the slit in the hook has the right dimensions and the towel is inserted correctly the hook will stay on the towel when used. Even while rigorous drying yourself the hook will stay put. When needed the hook can be easily removed from the towel so you can wash your towels once in a while ;)

I needed different sizes (for different hooks) and decided to make my first parametric model. It's the first time I do upload a (parametric) model, so if there are any issues please let me know and I'll see if I can fix it.