:)I replaced the TB in the knowledge that there may obviously be other things that could be tried first...at that time I was just happy to get it working. An expensive fix perhaps in hindsight, but as you say little tweaks come up all the time.
I've still got the old TB, still with the two sensors attached. I was going to send it to CW for him to play with but I never got round to it. Its still here if someone wants to autopsy it. I'd rather leave mine well alone as its running just fine now.
Also, my old TB was very clean...non of the deposits described by the thread poster, so its not a given that the same fix would have worked ?