I need to get a 3D spline to follow the outside edge of a circle. See attached, this is to create a cutting tool. The parts have been made I am just trying to create a drawing for this. It represents a mill cutting tool following the spline path but the tool not rotating just staying on a XY plane. See attached pictures and part file. From the front view it matches what I am looking for but the top view shows it not following the circle.