This is somewhat difficult to describe so please bear with me. I need to make a 10" pitch helical cut on a cylindrical part using a .5" diameter solid (referencing a .5" ball end mill). I'd done this with a solid sweep and a simple helix. Unfortunately now the customer wants the start and end of the cut to sweep in along a 1.125" radius while still at the same 10" pitch. I can manage this easily enough with a straight cut but can't figure out how to do this with a helical cut. I have attached a model showing the straight cut for illustrative purposes. The real issue I'm facing here is how to generate a path that is both helical about the centerline of the part and follows a radius from the od of the part to the full depth of cut. Any help would be greatly appreciated.