A lot of your terms above, zero point etc, I am unfamiliar with, doesnt mean I'm not aware of them, just the names used. Can you recommend some reading or training I might undertake, just to give me something to work with?[/QUOTE]
Any of the MEC books or books written by people like Gaby Buhlmann, Heinz Reinkemeier, Maik Eckhardt, Gary Anderson, Pullam & Hanenkrat, maybe Lanny Basham.
Some of the above are dated in some sense but still relevant. a word of advice; don't take everything you read & everything your told too literally, nothing is cast in stone!
Training?......from what your saying at the moment it appears you need some good basic instruction from someone who can not only explain basic positions to you & more importantly read from you what will & will not be possible for you. Not all coach's have this ability unfortunately. What you don't want is to be told to "stick your hip out" if your 4'6" & 17 stone, extreme I know but it happens all the time.
Dick Boschmann had a website linked to the Scatt shooter training site. He gave some very worthwhile advice. Dick was/is? a Dutch international shooter & one of the first, if not the first to shoot 600 ex 600; shot at intershoot in the early 2000's.
IF IT'S NOT BROKE.........DON'T FIX IT!