OR any copycats. When an idea actually WORKS, others come out with their own versions. You know......like Harold Brookshire. You can STILL see his influence in the camshaft world TO THIS DAY with just about every single modern grind out there and a LOT of grinds that have been around for decades. I'm not knockin DV. Lord knows he's a genius. But to grasp onto his ideas, theories and opinions and call them gospel for everything under the sun is on the other side of stupid.