I'd agree somewhat Haldi, the scaling of a gravy up & down and its changing flavour is near impossible to measure. Some ingredients may hardly register in a scaled down, or some like coconut as i found doing a 1/3 Ashoka base can become overpowering. Tasting a base on its own doesn't tell us much either. JB seems to have cracked it at home, judging by his posts on gravy/main dish cooking/ tandoor. His side by side with his takeaway base recently would suggest so. I've cooked some amazing curries using various bases & the Banjara onion paste, then produced some that went straight in the bin, all in the same session with the same base etc. . It's this bit that still has me baffled. Real shame nobody got to test Julian's food against his vids & book
Regards
ELW