It is marked constant curve.

Googling seems to suggest it is actually constant curve, before NP started talking "relatively constant curve" to actually mean "flex tip" cos in gtheir mind the tip should flex more and all that debate.

So - this is about a 1999 - 2000 ish mast. Forgetting that it is not high performance, will normal no cam freeride sails say 2000 - 2010 age from most manufacturers work on it as it is actually CC?
Or is it not....?
In which case - if it is not, and it is actually a bit tip flex maybe newer NP will work OK on it?