To install my rings I pressed down quite hard with the palm of my hand on the top of the ring, thus pushing the bottom down enough to snap on.
I made a removal tool by flattening out the end of a short piece of welding rod and bending the proper hook on it, then making a loop on the other end for pulling, works great. just cold working, no heat.
Doug, ME
64 TR3-B
60 Land Rover IIA