Everyone says that the matter is in the correct technique of applying the puncher. I agree with that. But the company where I want to buy the x1 simulator told me that the secret of a hard hit Bruce Lee in his strong wrist and hand. What do you think about this? And what do you think about these simulators? I don't want to buy all 3 simulators I will buy the x1 simulator they talk about it at the end of the video. I'm interested in your opinion . Or is it a waste of money?