Samson, I have a question.  Where should I contact most of the balls – when the ball is rising, when the ball has reached the peak in the trajectory, or as the ball is falling?
 
 
 
Good question.  I’ll give a separate answer for each stroke.
 
When blocking, it is important to contact the ball on the rise; this will help you to keep your block low and give your opponent less time to react.
 

I once had a student who was very ambitious about learning to attack.  Prior to taking lessons, he had only developed a pushing and blocking game.  For 9 months, I taught him to attack.  He said that he was using his attack against other players at the club.  Finally, the day arrived that I was ready to watch him play against another opponent, instead of just giving him a lesson.  Before the match, I told him not to worry about the score, but merely to focusing on using the weapons that he had been trained to use.
 

 
I have personally been training with the Newgy Robo-Pong 2050 for the last 4 years. https://www.youtube.com/watch?v=k2l8t3XDuKo   I use the robot a couple hours each day to keep my game sharp.  Here are some of the features that I really appreciate about the 2050:
 
1.  The setup for my robot only takes one minute.  It is always ready for a quick training session at any time of the day or night.
 

Philippians 4:6-9