Sam_
Down under
Top vs. Bottom. I just changed all 4 of mine and the top ones we're slightly shorter than the bottoms. Probably means you could sort your camber out on the cheap by fitting a set of top arms to the bottom?
Just tweak them out about 3-4mm longer then they were each side for the time being, they don't need to much adjustment to be honest and you won't be far out, I set mine to the original then gave it 4mm, dropped the car drove it up the road then tweaked it again on one side by eye to the front then matched the length on the other till I got it set up at the weekend, as you tune the camber out you will give it more tow in so that will have to be done to.
Depends on year of car I think? Earlier cars like mine had same part numbers for top and bottom.