Lula, I would like to see a video of the pushing technique using a vertical paddle, even better an instructional video.
It would be better if i get my friend to show it. But he never practice anymore and is not a coach either. If i train with him sometime, i will try to remember this.
I have not really mastered it yet. And i can imagine that it works best with an inverted rubber on the forehand. Compare to my short pimle, the ball will grip the inverted more so the ball will get more speed. When i do my return the ball always slips a little on my short pimple, the ball do not grip, that is why it is not so sensitive to spin. But i am speculating alot here.
If i will become good at this, despite my short pimple rubber i will try to film it. But i think i need pretty much practice at this.