Desmo rotate button

I wanted to make a model from my Ducati cylinder head (848 TestaStretta), in order to see the desmodromic mecanism.
So I printed a belt (model uploaded soon) and a button to make the camshafts rotate manually.
The "fingerprint" is oriented for counterclockwise rotation.

If you want to remix : https://cad.onshape.com/documents/4d244078076fd11cac891605/w/921a04bed5b3c40146b7eff3/e/535163d5b1ea6f39b5cd970c