Just had a chat with my mechanic again.
He is apparently getting confused with the TDC mark on the pully. It dosn't match up with the top of the compression stroke of #1 but he is sure you couldn't put the pully on the wrong way round. It seems to be 70 - 80deg out.
Is this something that is possible
If so, can you get an accurate enough reading for TDC just off measuring the top of #1 compression stroke?
Thanks
Paul