Bike Clip-light mount angled to point level from a seatpost. Lights that clip into a slot like this PrincetonTec snap into and out of place. This totally works with a medium/large o-ring, just like the model I remixed from. This is quick, simple exploration of using Prusa Slicer to a functional remix.
I printed in PETG, but provided PLA file as well, and .3mf just to invite scrutiny.
The author remixed this model.