Ah the memories. I remember I had a screwdriver with the correct head on it. To turn it I had to jam a socket on the end of the screwdriver handle then an extension on that with a ratchet.

Another hint, when you are putting the bolt back in. A little bit of chewing gum, or blu tak if you guys have it there to stick the bolt to the end of the contraption you built to get it out. If you drop it I can end up anywhere...

The most trouble I had was getting the clip that holds the cap on the sensor off. Some money went into the swear jar for that one.

Good luck... As with most things it will be easier the next time you have to do it..