Springs and bob weights only a factor until 1,500-2,500 where the AAU is full advance. Cam runout is a non issue as it is a constant. The scatter at full advance is cam chain snatch and pinion lash. Points may have some inherent attribute for scatter but that is a stretch. I have seen plenty of cases where I have swapped points for electronic off of the cam and still scatter. Switch to crank trigger and as solid as a rock. The Nourish was the worst with a cam triggered Hall effect trigger; scatter was horrendous and crank trigger gave solid performance. Point being that AAU is really not a factor once at full advance. Turbulence affects timing requirements right up through the rpm/load range of an engine, it is not limited to high rpm WOT. Has Lineslinger gained any additional insight to what is going on with his bike?