Hey Maurice, firstly some good elements you have, great acceleration and use of the body as you mentioned, also you are getting a nice contact on the ball!
I’d agree that you can definitely get lower in the shot with more bend in the knees which will make it easier to lift heavy backspin and also put less strain on the arm. If you also focus on keeping your body weight lower and more forwards especially at the end of the shot as you said that will help the control.
Lastly I’d say the overall technique is good just try to stay relaxed and keep the action smooth because you’ve got a good shot there, just small tweaks really not major chnages at all!
