It is too bad we can't take tools from one program to another. SolidWorks has a flex tool which lets one create a flat link and then twist it. However, I am still interested in how it can be done in MoI. The image I posted earlier I created in TurboCAD by snapping a 3D Spline to some 2D Arcs and 3D Polylines and then sweeping the circular profile. But it is not very accurate.