David, what mileage was that at? This one has done 30K.

I did scope the crank and cam sensors this afternoon and comparing it to Peters trace in the 'Workshop Data and Waveforms' forum the exhaust cam sensor is spot on but the inlet cam is 2 teeth (crank pulses) nearer the crank - I feel this is significant. If the chain was stretched I would expect to see it further away.

Going to take another look under the cam cover tomorrow.

Thanks, Martin.