Let a tangential constrain work on a spline. If you have a line connected to a point on a spline and wish for it to be tangential to the spline curve at any given point, surely tangential should do that. Its intuitively what i expected to happen.
Background: https://forums.autodesk.com/t5/inventor-forum/how-do-i-align-tangentially-to-the-spline/m-p/13073701...