Parameterized HTD 5 Pulley

I created this pulley according to the excellent article about making timing belt pulleys in Fusion 360: https://capolight.wordpress.com/2018/06/16/full-guide-to-creating-a-htd-timing-pulley-in-cad-fusion-360/.
It is parameterized, so that you can set the number of teeth in Modify > Change Parameters window by setting toothn. The pulley will resize accordingly.