Imo the reason people aren't offering to tune RST's is that some of the cars we see are absolute sacks of rubbish and the people can barely afford to put petrol in them and when you tell them they need some £££ spending on them they don't have it.......... So you do your best with what you've got..... customer goes away summit else goes wrong with it..... tuner gets the blame because it's just been setup...... slagging off on internet etc etc....
We don't see a huge amount of RST's anymore and its really nice when a well turned out car turns up for some work...... which i'm affraid is getting less and less nowadays with cars getting as low as £500 now for early examples
Steve