[pilleya]

We haven't particularly damaged any boulders during build or practise. One of our boulders has a few thin slices, but nothing particularly noticeable. Our practise field is in an old drama room with nice fabric sound proof walls, so this is most likely the reason for the limited damage. Also our shooter has Colson wheels, so it causes little damage. We have found that our shooter wheels gradually wear down the coating of the balls, with a lot of grey powder ending up on the shooting mechanism( it is the ball not the wheels which are wearing).