Hi Project. Thank you for filing that information away. I'm still undecided about the machine (they are not giving it away) - I don't actually have much need for grinding taps. At work, we scrap lots of pricey taps, seems like such a waste (we have not been able to find someone who could sharpen them). Whether I could turn that into an opportunity - well that is another matter.
I don't doubt that there is a certain amount of skill involved to get them right. It isn't like I don't have plenty to do as it is!