Can I ask once you descended steeply, interecepted and then went below the VNAV path at 320knts, how did you know to wait start to recapture the path when you were ~1400ft underneath it so you could kill your speed back to 256knts whilst comfortably settling back into the correct vnav descent path. Is there a simple formula saying that, for instance, every 10 knots of speed you need to kill whilst descending and rejoining the VNAV profile you will need to start your speed intervention 250 feet below the path? Or do you just do it empirically? Btw great vids, adds another dimension to descent planning rather than just slamming on the speed brakes.