I am about to replace the front spheres on my 04 C5 estate diesel (85000m). I used to do these things regularly on my BX's but I've never had to do it on any of my Xantias or C5s. I seem to recall that it was strongly advised to change the accumulator sphere at the same time as the suspension spheres. Is this still the case? Haynes manual completely ignores the subject! Allan F