i find the way you describe things pretty hard to beleive from RJM, as i said i use them regularly so i,m in the workshop alot heres a list of my cars i have had them work on with no probs
porsche 911 (996) turbo
BMW 850csi 5.6V12
2 toyota landcruiser 4.2 amazons
3 door cosworth 500+bhp set up by them and 183mph on its first run at brunters
escort cossie...dunno power..must be high 600,s did 10.3 1/4 mile
2 merc sprinter vans..both chipped and missiles now
your comment on rolling roads is funny....i have had 2 of the fastest recorded cossies in the past and neither of them have ever been near a set of rollers
a run up on the rollers is usually to supply the customer with something he can masturbate furiously over IMO
are you sure your car wasnt fucked before it was booked in?