well the chain and tensioner is done, runs spot on, really feels so much smoother and its throwing me back in my seat again, i dont know for deffo if its brough the maf numbers up yet as my laptop is out of charge so ill get on that later and post the results. also managed to do the chain and tensioner without removing timing belt, just cable tied it to the pully tightly, loosened all exhaust cam caps off and the cam popped up enough to get the chain out, then just being carefull to tighten bit by bit to get the cam back down again, all in took 45 mins.