I guess my v0 would be notches around the mating end to allow for compression, and a hose clamp. Maybe split shaft collars off aliexpress for a fancier look. Th

I guess my v0 would be notches around the mating end to allow for compression, and a hose clamp. Maybe split shaft collars off aliexpress for a fancier look. The design space of barbell collars is a big set of worked solutions to a very similar problem.