Brake sensor (magnet ring holder)

OpenSCAD files are available on my github repository:
https://github.com/bytezar/brake-sensor-holder

Holder for magnet ring for brake sensor:
https://www.aliexpress.com/store/product/Free-shippping-Power-cut-off-brake-sensor-Alternative-of-E-bike-brake-lever-fitting-gear/738588_32606950130.html

Put ring on cylinder and glue it to second part.
I used zip-tie to bound it to brake handle.