Bill, I have watched you do some incredible machining and I absolutetly love your work. I have cut alot of bearing tapers over the years,checking them with sine bars, and bluing them. Most all were cut using a Taper attachment. I have cut alot using the compound also. I have never tried using a form tool to do this. I would think it would be very hard to get an accurate taper. Also I would think chatter would be horrible. Im more of a blacksmith than a craftsman such as yourself. Please dont think I'm critisizing, I'm just tring to get a handle on this. Love your projects, please keep them coming.