to try and get back on topic.. no offense intended
When you gain new knowledge, you will almost always start out playing worse. There is a reason for this. The reason is the war between your rational knowledge and your experience. Because so few people truly have acurate knowledge, your memory and intuition will often conflict with that knowledge because memory of made shots are pretty close to perfect and knowledge, especially for the learning player, is far from perfect.
I say pretty close because if certain types of improper form are used the memory will be wrong. This is important, if you rely solely on intuition from butt loads of practice you will stagnate at a certain point and then you will have bad habits that you have to get rid of.
It is these bad habits that cause you to play worse when you gain new knowledge.
For instance, if you are capable of using side spin solely using intuitive judgment from experience and then learn BHE to adjust, your game will likely be off unless you also have an aiming system like ghost ball or others that give you a true aimline. Your experience for these shots will tell you to aim for the adjusted aimline that you are used to using, while your knowledge is telling you that your aimline needs to be as though there were no need to adjust manually. When you stroke through the ball you may try to adjust wrong or at the last minute deviate to do what your experience tells you you should do.
This is where inconsistency comes in, the war between experience and knowledge.
So if you don't have an aiming system that is true, in this case you will be off UNTIL you learn an aiming system that gives you true CP to CP line.
So the answer is this, if you truly want to get better you have to combine knowledge with practice, but you have to be willing to continually gain additional ACCURATE knowledge, and unfortunately there is a lot of knowledge out there that is inaccurate. If you don't and you try to get better solely by practicing and gaining new experience, you will stagnate at a certain level and not be able to get any better. It is only in the acquisition of new accurate knowledge combined with good practice of those concepts and visualisation that you can achieve your true potential.
And in all liklihood because of the level of knowledge achievable, you will never know your true potential, but you will continue to improve as long as your body and eyesight and brain hold up.
I hope this was a helpful answer to your question....
