Hi, yes some robots can’t change the ball placement, like this it’s hard with you doing the movement, I would say the main thing here is not putting your right foot in front when playing your backhands, also possibly this isn’t idea as here you are playing backhands from the middle area which you want to generally avoid.
I think for the moment focus on doing either forehands or backhands with this robot and then if you have a partner you can practice the different placements. Overall it’s key to develop good basics which you are doing well over a fairly short period, so keep up the good work!
