I put a qtr lev tps of ground-up dried methi leaf (KD recommends grinding dried methi leaf in her first book), into the hot oil along with a (BE) spice mix, chilie powder etc, when I do a madras. As the oil is warming beforehand I chuck in a finely chopped chilie, and when it starts sizzling briskly, I know the oil is hot enough to fry the spices without burning them (a Bruce Edward's technique).
I also use a very heavy frying pan, this helps contol the heat also. It's very easy to burn spices in a thin wok-type pan.
In goes the spices plus methi, followed by 30 seconds to a minute of frying, then in goes the base in stages. It's not perfect by any means but the results are better than any of my local BIRs, but I would say not quite up to the best BIRs in the land!
I tried leaving-out the methi, and also adding it later, but neither is as good.
Interstingly I still rate KDs base, although my version has evolved, I include home made chicken stock, small quantities of carrot & celery, and one or slight variations in technique.