OK, I managed to separate the decel values in Excel.
It's true: it doesn't follow the cell numbers.
Mostly cell are 21, 0, 1 and 4. But not only.
Result: the same IFR line as I posted before.
I'm happy with the result, I just don't understand the shape of the curve at low MAP. It just doesn't make sense (to me).
Do you have an explaination?

Stefano