hi bb i would beg to differ with regards to the base and recipe being compatitble with another base sauce, remeber i have had three very different base sauce recipe from 3 diffrent chefs at rajver and mixed and match with recipes and still turned out BIR standard curries and better, just ask the wife( and there could be no bigger critic). re the madras recipe imho i don't think a BIR would go near msg, but that is my opinion. and no lemon juice but again every madras recipe is different they all follow a formula up to a point, then you find them with tomato wedges or lemon wedges or juice ....regional differences! re the base again most would work with bruces recipes as well.
regards
gary