"Anonymous.CBM is not used on one by people who have a left side lead on a Reverse"
Exactly - there is no CBM in a reverse turn, or at least none in the topline. Any CBM used should be in the legs and hips only.
"and a right side lead on a Natural."
Wrong. There is quite dramatic CBM in a natural - that is how you end up with a strong left side lead there.
NATURAL AND REVERSE TURNS ARE NOT MIRROR IMAGES OF EACH OTHER!!!!!!!!!!
"This teaching is so old fashioned"
Funny that it comes from the same pool of people developing recently world champions then.
Have you considered that perhaps there is something you don't know? Because that is quite obviosly the case, as you would know if you sought periodic lessons with the best.
"The whole trouble with your supposed teacher is they no nothing about the collection points or neutral position"
No, the whole trouble is that by doing something incosistent with your opinion, their students win. That's a real problem for you ideas, obviously.