I’ve created a definition in Dynamo Studio using Points.ByCoordinates and NurbsCurve.ByPoints to a Surface.ByLoft. I started replacing ReferencePoints.ByCoordinates and… i’m stuck lol I cannot find a way to reproduce the Nurbs and then a surface. As usual any help is much appreciated 
Here’s the definition https://www.dropbox.com/s/mtrin4ycgns2tgb/Mass%20By%20Nurbs.dyn?dl=0