Thanks for all the great replies. Alot of good info in all the posts. Got to say this is a great forum. Been busy with work. Had some spare time today so took the brake apart. Firstly got to say - The design of the Elixir Brakes is very poor and cheap. The piece of metal that holds the pads apart is damaged. I tried to get the metal back in shape so I could go for a ride today. No luck so went for a ride with just a front brake. Took it easy as the ride was on a dirt track and it would be no good slamming on the front brake at the last minute. Not a good idea to ride like this, especially if you like hitting some speed and slamming on your rear brakes. Easy to forget you only have front brake after a while. I will order the new parts for the caliper. Plan on buying a Shimano XT group set in 2015. So hopefully the Elixir brakes will last until then.