line of sight
 

Can someone please clarify.
To ensure max trigger delay,6-B-1-C,the right elbow must "pass the ball"-Which is "line of sight".

So this is the point where R/elbow starts to push to straight and acc #2 is actuated ,both at the same time.

If so,can this also take place at less speed,giving me better tempo ,but still getting the ball a good distance.

Thanks in advance