Hi,
Problem solved, last owner had put the adjuster spring back in the wrong place- the position setting spring, I took the blade cover off to examine the mechanism, and realised the spring was in the wrong place. So in effect both were permanently as far right as they could go. Once I put the spring back to the side it should be on the adjustment for position worked properly, I am surprised it did anything at all before. I have roughly set now- just waiting for sun to go down- or a cloud to appear so I can set exactly…..
Thanks for advice.
I need to check and adjust all the settings I think, if this was put together wrong who knows what has been tweaked wrong.