We had a somewhat catastrophic failure of our dry sump belt on Saturday which led to the demise of the engine. My best guess is that the tensioner failed - the bearing is very wobbly on it now - and destroyed the belt, pieces of which got under the cambelt cover causing the cam belt to skip a few teeth.
I have been told that there are 2 types of dry sump belt tensioner - if so, which is the best one to have? Mine was an automatic (sprung) tensioner.