Logitech Z533 Volume Knob Indicator

I find it very hard to read the Volume level on the knob (see pictures), so i decided to model an indicator.

Pleas note that the indicator does not clamp tight on the knob. But that is not a problem because as soon as you touch it you press it against the knob, so it doesn´t move around. If you want a tight fit, you can scale it to 99% or 98% an print it. 

If you wanna modify the model I leave the CAD (its freeCAD) in the Download sector.