Those are some cool videos. Amazing how much an arrow flexes when shooting with fingers. Really shows the importance of spine selection so that the arrows will clear the rest. Those arrows look like snakes going downrange.
Arthur this is a very interesting post. Not that I doubt you. And your explanations make perfect sense. But I just purchase 2 new Martin bows and I sent them an email to see what their response is to your technique. I will post it when they send a response.