Hi Simon, Thanks very much for clarifying that, just a couple of questions to make things clearer in my mind. I get why the 20v 4AGE needs 4 TDC points on the CAS to tell the ECU when to fire, and sync to clarify the place in the stroke ?. The v8, you noted also needs 4 CASE points, and one sync. I did wonder if that was a typo. Did you mean 8 points CAS. With 4 CAS points on the v8, would it paired injectors, and wasted spark ? how would the ECU know when the other 4 CAS points were.