So I am watching this video on how to replace the struts on my E86 and I think I can do it. Problem is this guy recommends a reinforcement ring to prevent mushrooming of the upper mount. I have looked everywhere, and although I have found reinforcement rings for other models, no joy on the E86. Any clues? Also, I would welcome any thoughts on particular struts. I'm no race car driver. Will the OE Bilsteins be fine or should I change to Monroe or Koni or other? Thanks for anything!