You will next need to remove the bolt which is an allen key fitting on the side of the box, (mine is out already, its not the allen key one in the pic but the one above and to the right, inside there will be a cylinder (which you can see), spring and ball bearing, the cylinder can be a bit awkward to pull out, i put long nose plyers in the hole and pulled them apart to grip onto it, take these out also. (note i have removed it already and the spring inside has popped out.) If your having trouble getting this out, you can still remove the lid, then try. (dont worry the ball wont drop into the box) That's the bit I came to find the pic for but can't remember which of the two Allen headed bolts it is Phil