Shimano Cantilever Brake Retainer (modified)

From Parent by chriskmurray:

Replacement brake spring retainer cups for older Shimano cantilever brakes such as the BR-CT90-M.
These brakes were notorious for the spring cups cracking which would then keep you from properly adjusting your brakes. Those cups were long discontinued by Shimano so I decided to model new ones so people can 3d print replacements rather than throwing away their brakes.

This is modified so the adjustment screw is in a slightly different orientation; the original interfered with my brake lever.