i hope you can help me with the following problem. You would have a oil dipstick, which would be general 3D curve spine. And you would need to create twisted section on it. In proe, you would do it the way, that you would simply draw a line in the sketch and constrain it with angle. And than you would do it as variable parameter for example angle = sin t...where t would be 0 to 1 of the curve. Do you have any suggestion how to do it in UG?