I had to register so I can chime in here, I have two Caterhams one with a Contour engine and one with a Focus engine and have had the same issues with lock up that Caterham 7 has talked about. And, I have seen the effort of Tom and Larry to get this resolved.
Blivit, it really sounds like you are more on the ball than some we have spoken to at SCT, is there anyway to contact you at work and talk through the issues we are having? From your responses here it sounds like we could make some headway with you on the line.
It really is very frustrating trying to get out cars tuned.