Hi Les,
I stand corrected mate ;D
With that said, yes, I can see it working for korma because you don't have any spices as such that need cooking. Essentially, with a korma, you are basically just boiling it anyway. If you check out the Dipuraja videos, he demonstrates how to cook a korma, and its basically, everything into a cold pan, and boil down to the correct consistency.
However, on the more robust curries such as madras, jal frezi, dupiaza and so on, you need to reduce the first lot of base long enough for the spices to get fried in the remaining oil. Could you imagine trying to scale up x 4, and adopt the reduction method?
You would need to reduce down 800ml of base

It would take forever!
I'm not completely ruling out up-scaling, I just think it will be very difficult and quite lengthy to do, using this reduction method.
If you want to use the fry method, then I don't see a problem, as you are frying/cooking the spices, garlic, tom puree and so on, at the very beginning, however, I wouldn't use the Taz base if you are going to use the fry method because your end dish will drowned with oil

Hope that explains where I'm coming from mate

Ray
