3D printed spacer for madone to install bell

Some of the road bike drop bars are not round so it is hard to place a bell on the handlebars. I recreated a headset spacer for my bicycle (trek Madone) with some room for a small bell. 

I got the Knog Oi Prima bell.

https://makerworld.com/en/models/2615765-trek-road-madone-spacer-with-knog-prima-bell