In 20 years of trying you must have seen inside a kitchen or had some recipes of a chef??
Yes you'd think so wouldn't you, but I'm not a particularly outgoing sort of person, so I've never really had the gumption to ask for a recipe, believing that there would be no way they would tell me. Even at my peak of eating curry at restaurants, sometimes twice a day, it never crossed my mind to dare to ask to see inside the kitchen as I thought they would take this the wrong way. Most of the info I got was in snippets talking to the waiters.
That said I managed to sneak a look inside two kitchens a few years ago (my friend asked!), but all I saw was what has already been mentioned here: big pot of base sauce, curries cooked in frying pans at full heat, 10 or 15 pots of ingredients next to the range, lot's of flame coming from the pans, etc. I would have fessed up if I knew anything that had not already been mentioned here.
What gravy recipe do you use?
It would be easier to ask which one I haven't used. Currently I have a batch of Bruce Edwards' and this is definitely the best I have used so far. It differs only in the use of carrot and pepper from my previous best, but this is clearly the way to go.
What I find satisfying and yet also frustrating at the same time is that I haven't really learned anything new, yet, from this site. I would have been quite miffed if someone who had only been doing this for five minutes suddenly put my years of effort to waste. But I will still try anything that looks potentially promising, no matter who or where it comes from.
A defining point for me will be when someone posts, 'I have seen a restaurant base sauce cooked from raw ingredients to finished curry, it has that taste, and no unusual ingredients were used'. That's when I'll stop searching, because I still believe either some ingredient or technique is still missing from the base sauces that have been posted so far and if there isn't I would have to give up.