That makes some sense, arrow point wants to go towards the power stroke and tail basically kicks off the rest at the end. However , how do you explain why when walk back tuning if your arrows fade to the right as you walk back the correction is to move it left. Seems contradictory.....That arrow flight video alone may be worth the cost of the app. I've had the Bow Shop Bible app for a while but hadn't actually watched that particular video until just now. The counterintuitive recommended rest adjustments now make perfect sense after seeing what's actually happening in slow motion.
Below is my attempt to illustrate what's going on based on that video and Corey's commentary. Dynamic bending of the arrow shaft also plays a role, which I didn't attempt to include in my illustration. Rest type is also a factor: the longer the arrow and rest are in contact, the more pronounced the effect of misalignment between the rest and string path.
View attachment 266972