I recently submitted for ideas on how to remove the factory rubber bushings to replace them with poly. Two responses included 1) burning them out with propane torch, and 2) physically beating them out with a socket or pipe. Comments: The torch method can be harmful to your health unless you're wearing a respirator or like to inhale tire smoke. My solution by trial and error was: 1) Use an electric portable jig saw with a fairly aggresive wood blade. 2) Clamp the MB in a vise and insert the blade through one of the four slots in bushing. 3) Spray a little WD-40 or similar lubricant on the blade and bushing. 4) Hold down firmly on the saw and start cutting and work your way out to the ID of the metal insert. Hug the metal to remove as much rubber as possible (saves removing remnant later). Lubricate the blade as necessary to reduce friction. The bushing will push out easliy. 5) Remove any of the remaining rubber with a half round file until you can install your new poly bushings. A sawzall would probably work too, but I did not try it. Good Luck Guys! Dave.