Hey Rod. Been down that patent line in another life -- but as I said if it works as expected ( i'm sure it will ) only too happy to pass it on to deserving persons especially if will be of benefit. M/C is simple -- only one piece of precise turning but a miller is also reqd to dress one face -- could do it on larger ( big ) lathe & flycut. Really just enjoying using owm m/c's &solving the problem. Regards Jim