I signed up purely to say thanks for this! I got my car 2 weeks ago and this has been driving me crazy, I was ready to pull the dash out! All went pretty smoothly, the hardest part as other have said is that back bolt. I dropped it and nearly lost it when trying to do it up, but managed to get it back. Also I lost that little copper strip, but it still works fine without it. Another problem I had was that one of my other smaller cogs had a missing tooth, but I worked out that it doesn't quite do a full revolution, so I positioned it right and its all good, until another one breaks off Now just to fix my actual air-conditioning Thanks again!