Never quite sure what the best way to approach this sort of thing is.
In this case, I have 8 NURBS surfaces which I've extracted from an existing solid. 2 chains of 4 connected surfaces, and essentially I want to fill in the space between them to make a solid.
(None of those surfaces are coplanar, nor are they rectangular)
So, the red lines I've indicated would be some of the new edges on that solid.
What's the most efficient way of doing this?