The roads in Aberdeen must me some of the worst in Britain (certainly in a British city). My poor old suspension (which wasn't in the best of health to start with) has taken a hammering. But I've just managed to buy a complete second-hand set of lowered sports suspension units from Ebay for just over £190 incl delivery, saving about £200 for the units plus gaining the advantage of simply being able to do a direct bolt-on swop with the existing units, thus reducing fitting charges.
No inserts to bother with. No fiddling with oil. Just whip 'em off and whip the new ones on. They shouldn't even need adjustment. I need to get new droplinks, front and back (another £80 or so) and then I'll be ready to face the potholes of Aberdeen once again. Overall cost about £400.