Like I said fella. Powerstation have a base set-up due to the number of AST kits they've fitted. It's worked for the AST's. There's no trial and error involved. The damping on H&R, KW, Vmax etc is obviously going to be different. But if you look around at motorsport places, £240 for coilover set-up is extremely reasonable. You can bung on a generic set-up, but that's not getting the best out of the coilovers, far from it. If you're doing that, might as well get some settings in mind, then just go to a local alignment place.
If you go to a garage and ask for a set-up, all the previous R+D that powerstation have done, obviously hasn't been done, so when you consider that the work that goes into it, it's a good price.
Might be an idea to find out the prices of decent places for a new set-up before criticising the prices? I have, they were cheapest by £100 (min).
(PS Yozza don't do the set-up themselves, it's a race team they use.)