I am trying to create a horn shape using an ellipse for the mouth and a circle for the throat with a semi exponential equation driven curve between the two. I have tried creating a point cloud however, solidworks keeps messing up and cutting a large potion out of the mesh. I have also tried sweeping the curve along the ellipse and circle but since the line is constantly changing along that path solidworks can't interpolate the spline. Ideas on how to build this into a soild?

Attached:

1/4 of the Point Cloud (could mirror and then mirror again?) I have the full available if of interest but same failure happens.

Screen shot of my results with Scanto3d

.xyz files with throat, mouth, and spline