Now the gold sachs has apparently only covered about 7000mile so I was going to try it first before thinking of a re-build.
I weigh about 12stone and find the standard shock a bit harsh although I have softened it a bit which has improved it, I definitely thought it was better when I has the wife on the back, but then I was riding very steady.
Sorry rambling on a bit

Ideally I wanted to have the forks serviced at the same time as fitting the shock. Some comments have high praise for aprilia performance at Tamworth which is a possibility but I also could use the aprilia dealer in Exeter, anybody use/recommend them?