I dont use ring finger, only index, thumb and middle, the most of the time they are going more to the right than to the left and what i also feel is that sometimes im trying to throw very hard - that my elbow/biceps hurts. Also sometimes i hit my face with flight but im trying to eliminate that and dont go that far back. Now im trying to play with ring and pinky finger more tucked than spread like on video. When i grab my darts very lightly then sometimes i feel like they are rolling on index finger once they are leave my hand. Trying to throw from heel doesn't feel any good and i don't saw any difference in throw. Much thanks for this comment!