Your exemple works only if the Rectangle is a "square" else sides are deformed :)

The only thing curious was that the initial position of the profil section was changed and deformed itself :)
Despite ot that Rail Revolve is a very funny and useful function :)

> Your exemple works only if the Rectangle is a "square" else sides are deformed :)

Yeah, there isn't any way to avoid that type of deformation in rail revolve because it does a part of its work by a scale outward from the axis line. To place the profile along the farther point of the rectangle it is scaled to get there and scaling grows the entire shape.

- Michael