This is my first proper post, and its bit of a a daft one, but I'll say it anyway.
I've just made up a batch of base, using the KD recipe and method, mainly because it gives the amounts of onions in weight, and it's worked for me before. I've incorporated the spices and stuff from the Darth base, because it comes top in the pole and the results were very pleasing - the base tasted nice on it's own and I have no doubt I will be able to make some good curries with it, so that's already a result as far as I'm concerned.
Anyway, at no point did it have that same smell as an Indian restaurant (you know the one). I live about 1/2 mile from a take away, and 'the smell' usually wafts over at about 4.30 PM, long before it's open to the punters, which is when it seems to die down. This suggests to me that, if there is a key ingredient that I'm missing, then it must go in during the 'preparation, rather than when the action starts later in the evening. I reasoned, if it's a spice, then someone would have recognised it. I'm taking a wild guess that its some sort of vegetable being cooked in during the base stage.
I've also noticed, when at my Mam's for sunday lunch, that the mashed turnip has a smell slightly similar to the elusive restaurant smell, not identical, but closer than anything to come out of my kitchen. So I wonder, is there turnip, or some relative like mooli, in the base.