The 11mm socket, extension, and Allen key was a good solution. Mine is a pretty much brand new and an SP-01. That bushing did not want to budge. I got an ice cube and rubbed it around the inside of the bushing for about 6 seconds and then I got her to let go. I had my new bushing in the freezer for several days and it went it pretty easily. A dozen or so strikes with the nylon head.