Thanks for the replies,
Everything has been fitted as the instructions. 4 shims at top and 4 at the bottom 4 different thicknesses.
I have not fitted the housing seal and retaining plate although it is in place ready.
It says add or remove shims to achieve the correct tension. I didnt think I woud need extra shims.
I have since fitted another of the thickest shims and it is still tight although not as much.
I wonder what the most amount is allowed or has been fitted?
I have ordered some more shims and will assemble the other side to see if there is any difference.
cheers Peter