customizable Bicycle Chainguard

Bicycle chainguard to protect your pant against oily chains.
Customizable in number of bolts, inner and outer diameter and bolt circle diameter. Examples for Shimano, Campagnolo and SRAM cranks in the openscad file.
Of course different patterns can be applied or easily created.

I printed this with black PLA. We will see how long this thing will last in urban conditions.