Hi Pete,
I have often thought that Tandoori Masala might be part of the answer because a friend of mine can cook almost any curry from a recipe and adjust it to have a little something that my curries always seem to lack. He uses Tandori Masala in large amounts in every curry he makes.
As for the chicken stock cube, this is re-introducing msg into the equation as most stock cubes contain a large amount of it, and IMO have very little taste of chicken.
here we go again, maybe this combination will work,
Cheers Pete,
Blondie