Hi Kevin - one other thing that may possibly be useful to you is to use the Construct / Curve / Isect command, which will generate the intersection beween 2 surfaces as a curve object, that may help with visualization.

It is also possible to enable history updating on the intersection curve - to do that select it and run Edit/History and click "Enable update". Then if you adjust one of the surfaces that intersection curve will update. If you mouse over the intersection curve you will get that selection halo around it, it may help you to more easily see what is going on there.

- Michael

Thanks Michael. Thats a very handy tip which I didn't know. I can see myself using that a lot to get my surfaces to conform to the approx shape I require.

It seems to be the best way to create larger surfaces that are later trimmed (to avoid the panel by panel approach) and yet still model reasonably close the profiles I require.