Adding a surface to a wireframe truncated cone from grasshopper

Rhino Rhino for Windows
1

Hi,

I have tried all sorts of ways, but so far failed to surface the truncated cones in the attached drawing.
Perhaps I should have been able to do this in Grasshopper?
Or constructed them differently?
My project is to surface them, trim them where they intersect, then unroll them to form flat pattern shapes.

tetrapod surfaced.3dm (128.5 KB)

Thanks in advance for any help…

tetrapod 1
tetrapod 1.jpg1092×479 145 KB
Tetrapod 3.gh (12.1 KB)

2

Ha!
I just did it - answer was to use ruled surface for the sides and boundary for the tops.