I made this dish last night as per the original recipe for the CTM sauce, but using Blade's tikka (brilliant as usual) and my own base sauce recipe. I can understand the enthusiasm and the sauce is quite good. I haven't had CTM from a BIR for about 20 years, so it's hard to compare. I have, however, made makhani sauces (similar) more recently and, for my taste, I prefer the flavour of makhani over this CTM. One key difference, of course, is that makhani sauces do not usually include coconut or tomato soup.
I'm not perusaded that the use of tomato soup is justified over, say, passata. For a start, it's quite expensive, and the soup provided an edge to the flavour which I was not very keen on.
I may try two more CTM recipes before deciding whether to press-on or abandon CTM in favour of makhani: (a) the winning recipe from the forum's group test a few years ago and (b) Heston B's recipe for CTM in the book "In Search of Perfection". It's a bit complex, that one. Has anyone here ever tried the Heston B recipe?
But I now see the Group Test results were never published. How can this be? Useless! The project manager should be held responsible.