I decided on the Calmini shackle reverse. Everything went together well until I got to the Front of the rear springs. I also bought the retro bushings for that. I got the bushings out, finally, what was left was a steel sleeve inside the spring. All of the other bushings came right out, and the new ones went right in. Does this sleeve have to come out as well? New bushings appear to be same size as the sleeve and would look as though it need to be removed as well. Thought I'd ask the pros before I start whaling away at it.