Tried this today but with some modifications.
I used the base by CA, my own spice mix, less salt and chilli powder and no food color + added a heaped spoon of double cream.

The smell and taste was indeed like a very, very close relative of the CTM sold in my local BIR`s. The look of it was also a clone except no red color.

After I tried this I dont think I want to go out and buy a CTM anymore because even though I cannot say that this is better than my local BIR, it is so much alike and I can make it fast and in large quantity.
Plus I can get onions and other veg so cheap because I know a fruit + veg wholesaler who undercuts supermarkets by a very long way....

Hi I`m David from Wales and I have become frustrated by not making curry as good as my local curry house. Chicken tikka masala, butter chicken, korma are the main ones I want to do as well so we will see.......