Nickyboy, this is what Grizz said about adjusting after they've been fitted:
grizz wrote:Once fitted it ok to adjust , takes a bit of time on the rear but not too bad .
Yes it keeps the drc .
That was in reference to the B7, I don't know if this would be the same for the B8.
I might want to adjust if the original setting was too low and I am scraping a lot or rubbing on the tyre, or if the original height wasn't low enough and I find that ground clearance is still fine.
You might buy new tyres that are a little wider or squarer and find they rub so might need a little lift. I guess it depends on how low you want it. I want it quite low so might need fine tuning to get it exactly right. If you are riding higher then once you set it you probably won't need to touch it again.