Use reference lines for both, then select them and create solid. You can as parameters and you are set. I did a water slide this way. I drew a 3d spline with circular sections. I did have to add a section at each control point of the spline. Ricardo A. Maturana Twitter: @rmaturana
Yes that works OK for me now. Divide and repeat doesnt seem to work other than arraying unfiorm circe instances. But inserting with an instance radius param does and then manually repeat instances. Cannot figure out who to control the path - Edit proile finds a profile with grip nodes but comes up with "regeneration failure" as soon as apply is attempted. Add profile seems to add some bizare contortions.
There is a way in which Divide & Repeat can use different sizes of the repeater, and there are ways to control the path of the snake with adaptive points as well. It just requires more work, but it is possible. But if you want a smooth transition between the profiles, what I showed in my previous illustration works well, using profiles and a path. The other method with Divide & Repeat and different sizes will not create a continuous smooth form, but it will just repeat items without a transition between the items.