I did this one by using sweep. Then play with angle and divide larger than in export to adjust mesh as you want.

I think network may be more for shapes that are more wavy and cloth like. when you have a smooth surface, look for sweep and revolve.

I was originally trying to do it with revolve as the surface from this function is beautiful, but I couldnt figure out to get the top profile in it. (maybe non-symetrical cant be revolved, but rail revovle with "Scaling Rail" would have done it! Dont laugh, please! :) )

Talk later,
Burr