I've been very quiet on this site - most impressed by the passion of the people here and their application of both science and art to this lengthy quest. Ever since my first delicious BIR curry in 1960 I have been struggling to match that so-elusive taste and flavour. I must have cooked over a thousand curries since then - often starting with renewed hope that I might have hit upon the real secret this time but never, never so far, scoring my own effort any better than about 50%. "Nice" curries, certainly but NOT BIR.
And now here we have the results of Panpot's meticulous and tenacious quest (some people never give up!). In addition to the praise he's getting from the very critical people here who have already tried his recipes; what a very nice personality emerges from his postings! - Generous and without the slightest hint of grandstanding after having, apparently, cracked open a very crucial problem "the final 5%" somebody said.
OK I shall try to do the Bhuna this week and will post again after but, of course, from a guy who has done a thousand failed curries over 40 years, you'd have to be skeptical unless I started to rave at the result!