Connect the arms to the body to stop inconsistent contact
Danny says inconsistent players let the arms move too freely, describing it as having too many loose screws. To fix it, tighten the screws under the armpits, particularly the trail arm, by moving the trail elbow inward toward the body so the arm stays connected and has less freedom to move around. The claim is that removing that excess arm movement makes the motion more repeatable.
Channel: Danny Maude
Watch official source at 1:32Why this context matters
Framed with a 'screws under the armpits' metaphor for arm-to-body connection.