Knog Oi bike bell - large to small handlebar adaptor

I need to move my Knog Oi bell from the fatter part of my MTB handlebars to the thinner part but it wouldn't quite go small enough, even with the original smaller-bars adaptor. They sell a special smaller bell for that…

So I designed this adaptor to fit my large bell to small bars. It's deliberately offset so it can be fitted up amongst my brake and gear levers without fouling on them.