The secret to doing the cams is to remove the rocker on the valve that's being pushed open. When it's aligned the one valve is fully open and right on the top of the cam so the slights movement (with the belt off) and it springs the cam closed. Remove the rocker bolt on that valve so it's not pushing the valve open and then you can virtually turn the cam by hand and it stays where you put it! The other thing that (for me) made the job easier was to use a spanner on the tensioner and then told the spender in place with (in my case) the end of the trolley jack. So now you have the cam not trying to move under the valve pressure and the the tensioner open and not able to move leaving you 2 hands free. Put drills in the cam wheel holes into the tapper chest then the belt goes on much easier. It's tricky but just take it slow.
