Sending the barrel rearward, is a running start that doesn't use up the stretch until "go". In fact, it is part of the stretch creation process. The barrel gets a running start, without commitment, and IF commitment is made, you still have the stretch to aid in the "launch and spend".
Compare that to if you sent the barrel forward at "go". There would be no running start. No early batspeed. You'd use up the stretch immediately. You'd be committing immediately.
And worse yet.....you could not make any last second adjustments because the hands have already been committed to the ball.
If the barrel is sent rearward at "go", you have early batspeed without commitment AND high adjustability.
This allows you extra read time.
As to tucking or slotting the elbow. It goes there but you don't do it. IMO, torquing the handle is the thought. IF you torque the handle, the elbow will slot.
IMO, it's a no teach....unless you're trying to do what Ryan Howard does....get a running start into handle torque.
