So, what is the correct viscosity/consistancy that we should be looking at. Describing it as 'soup like' can be a bit miss-leading unless we know exactly which soup and brand, hot/cold.
I don't even know in what units viscosity is measured, although I am sure Wikipaedia would tell me

But how one would go about measuring it in a domestic kitchen is another matter completely. I suspect it is rather like cooking rice : with sufficient experience, you just
know how much water it needs, and I think the same is true for the viscosity of the base and the viscosity of the finished curry. The only way in which I think we might manage to communicate to each other our preferred viscosity is to consciously think, as we make the base or the curry, which common liquid would feel much the same when stirred, and then use that as the analogy. At the moment, and sitting in front of the computer rather than stirring curry in the kitchen, my feeling is that the closest I can visualise is warm motor oil.
** Phil.