The instructions seem to make sense so I tried them on my engine a S2 lump and it indicates surprise surprise the timing is out so weather permitting I will go over to Hartlepool and have another go at the valve timing. I was dubious at attempting this with the engine in the car but once I had took the bumper, radiator, water pump, dynamo, crankshaft pulley and timing chain cover off I was pleasantly surprised how much room there was and as the car is up on the dollies it was at a good working height.
Clarkey