No problem! If you look at Fang Yinchi when he demonstrates the wrist only technique, you can see that he has his elbow/forearm in the optimal hitting position. He doesn't even realize how just getting to that point can be such a struggle for adult learners. He may recognize it in someone when he does coaching camps, but he would most likely see it as an easy adjustment, get the student to do it right a couple times while serving multi-ball to the same spot, and then move on to the next topic.Thanks - makes sense. I need to focus on finding and identifying that catch and release feeling I guess. When you say BH hit - what exactly do you mean (Flat hit or more open blade topspin?)
Practicing this actually takes a lot of time. It doesn't take long to find that feeling, but it takes a lot of practice to get it with any degree of consistency. I took some steps back before finally taking steps forward. In a real game the ball's speed and trajectory changes drastically with every shot, it can take a long time to even begin doing it consistently. Like @NextLevel alluded to, improvement is not a rigid process, it'll depend on the situation with each coach and student. Most adult learners aren't so interested in getting the fundamentals right that they're willing to be stagnant or maybe worse for some time before getting better, they just want to get better with every practice. That's perfectly fine, there's simply nothing wrong with wanting that.
With that said, IMO at our level of play, it doesn't take long for this type of practice to start improving our game. I was worse for maybe a couple weeks, and then stagnant for a couple months as my technique seesawed, and since then have seen steady improvement. A couple weeks ago I feel like something finally clicked. I think it's because I finally found a practice partner of similar level so that I could really train this shot against a real human, with progressively more complex and more real game-like situations that we can control.