I know I'm a mug for trying this but I have just run out of my last base so I thought I'd give it a go. Everything seemed fine until I measured out the spices, I couldn't believe how much there was. To me this is far too much spice for what is supposed to be a general all-purpose base. And when I tasted the finished product the chilli caught the back of my throat. In my opinion the base shouldn't have any chilli in it at all and the deggi mirch is pretty strong. You couldn't use this in a korma as most people who eat kormas wouldn't be able to take the heat.
Other than that this base has a very unpleasant smell as if I could always smell raw spices and on its own it doesn't have a pleasant taste, although I did leave out the carrot as I didn't have one and I've never found that they do much other than provide some sweetness, but it might have helped in this case.
So, judging just by the base I'm not too impressed but, I don't judge only on the base but on the finished curry and I'm going to do a chicken madras as per the recipe and see if that can't change my mind.
BTW, all this namby-pamby spooning off of the froth, what's that all that about? Taste it, it isn't in any way unpleasant. I just mix it back into the base and it makes no difference.
My oil didn't separate either and I know from experience that this is caused by the use of too much powdered spice. So knowing that, I spooned as much of the oil off as I could just before I blended it.