Hi Hbasm - it looks like you really want a kind of disc type shape from this.

I think you may be better off using the Rail revolve command which allows you to kind of pivot one profile around an axis while at the same time stretching it out to meet a rail curve.

So to do that you would have curves arranged like this (see file attachment RailRevolveCurves.3dm for model file):



Then to produce the revolve, select the vertical profile curve, and then run Construct / Revolve / Rail Revolve.

Next select the lateral path curve as the rail.

Then the next thing will prompt you for the rotation axis, you want to pick points at the top here:



and bottom here:



That will then create a surface by pivoting that proflie curve around that axis and also stretching it out to meet your path, to make this result:



Here's a look at the underside:




That is a probably a better tool to use for making a kind of regular disc type shape, it will have a very regular shape throughout.

- Michael