I think you mean Unifiber chart
unifiber mast chart 2019

I would plead with Severne to disclose its curve. I don't know if this mast is RDM?
from
[email protected]
he would say that
Any mast will work on any sail, it depends on how much you are willing to give up, in performance and range, and how much to have to begin with.

these dots are, covering a range of, 0 to about 20.
none does 0, and most are middle of the road.

first and foremost is find out the curve on the 20.

Suggest you up date, your findings, that Severne states it remains the same curve.
I asked if RDM, FROM my experience a SDM is more forgiving, to a less than perfect, many factors however enter .