Michael & Mike,

thanks to both of you.

This was more of a surprised then a problem. As you mention Michael, as it is the rail revolve uses a kind of radial scale (only) and it works fine (I like it a lot). Out of curiosity, instead of a sweep type method, would it be possible to scale radially (as it is) and scale say axially as well. It looks to me as if the operation is just discarting any metrics other then the radius value, the resulting object is exactly the same as if I used a planar rail.

Thanks,
Felix