Hi Eric, actually after looking at it I don't think that twist=flat is going to help you for this case, since it produces stuff like this:




After looking into it a bit more yet, I don't think that sweep will be able to do this for you - when you have one profile that you are trying to sweep, sweep does not do anything to change the shape of the profile.

I think that's what you would need to have happen for your case to work right, the rectangle would need to mutate to a trapezoid or parallelogram for different segments, but sweep does not know how to do that.

Like for example in your model here you have a rectangle that is sweeping downwards:



But the adjacent piece next to it here:



Is not actually a rectangle in that same kind of cross-section, it is a trapezoid with a slanted top:




Sweep does not know how to swap out rectangles for trapezoids in different areas, it only tries to put a rectangle (or whatever your profile shape was) on everything.

So I don't think sweep is going to do that for you.

- Michael