Both Chris & Axe have emphasised the importance of keeping an open mind, and I apologise if I seemed to be presenting instead a closed one, which was not my intention. Rather, I wanted to say that I had tried new, different, ideas, but some (such as the Taz base / reduction method) had not seemed to lead to a discernible improvement, and had led to extra work which I felt was not justified by the results. I have used pastes, in the past, and they represented a distinct improvement over anything I had tried before, but now I feel I have "progressed" beyond needing pastes, and use (as far as possible) individual spices, the sole exception being Bassar Curry Masala which is so complex that I cannot see any point in trying to replicate it from scratch. But I remain open to new ideas, will try cooking the g/g paste to the point of browning, and will try vegetable ghee instead of vegetable oil. I am less inclined to pre-cook on a barbecue, simply because that seems (to me) more appropriate for a chicken-tilkka based dish (which I never order by choice) rather than a dish based on freshly cooked, non-tikkad, chicken. Charred spices ? I think SWMBO would complain very loudly and at great length ...
** Phil.