Sweep 1 rail

Hi, How can I get a clean sweep 1 rail on the image attached (rail in white and cross section in red). If i rebuilt too much the rail I loose the details.
Joana Cunha

You could try turning on history while doing sweep1, then turn on control points for the curve to adjust the points so sweep1 surface doesn’t self intersect.

other way I guess is turning on control points and selects points you want to smooth out and use smooth command.

thanks! I will try!

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If all else fails you can post 3dm file and someone can take a closer look.