That is to say; your downswing should go back to and through its address position and on towards the ball. At address visualize a direct line or path to the ball, and take the tape marker and your power down that route to the ball. Then in your downswing take the tape marker on that line towards the ball to guide the lower part of the club and the clubface to the ball.
At the shaft's tape mark, the club's power kicks in, to drive the clubhead through the ball. You don't need to think about the lower swing at all. The bottom swing is automatic. You are to think about making a perfect swing with only the top part of the club shaft. The golf club will take care of the lower swing by itself. The bottom part is triggered to begin all by itself. The trigger occurred as your power crossed the tape on its way directly to the ball. In your downswing establish and use a pathway to send your energy to the ball. Then at the ball, lift and fly it towards its target.
You manage only the top part of the club. And swing your power straight towards the ball. There is no lag when you use only the top of the shaft in your swing. So now you can swing away as hard as you like and still make a solid