Thank you Eric, what I wanted to know and was not clear about is the method of assigning the spark I believe that the Pertronix is a Hall effect device basically a revolving magnet. I wanted to know if the Magnaspark was the same. I have the Magnaspark but I’ve seen a test where the Pertronix is all over the place at higher rpm. The test was on the 123ignition website, obviously it’s dizzy was very stable.