Tried to capture the same moment PlayingWithTBI showed on page 2 of this thread. 2nd gear, accelerating.
After adjustment, Knock Retard is in 4-6 range instead of 7-8, Spark Advance looks like it follows a cleaner line along with the RPMs. I don't know what this information means.
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But while cruising at 50s is seems to be all over the place.
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I checked from above and below for signs of exhaust leak from the exhaust headers and don't see black indicating a leak.