Mbalhizen... Are you talking about an infusion mast?
I'll tell you our range on our infusion is pretty much 37-42 and we've gone a bit higher when it really starts honking.
We usually sail around 39-40
Most of the other infusion sailors I know have a similar range and average.
I've never gone below 37 and don't know if I would.
With the new mast base it is essential to carry a wrench on the water so you can adjust per conditions on the water.