I'd say use 1 single point focus, focus and re-frame after focus acquisition.
Thanks Marcel,
Taken that on board and trying all suggestions, bought the AF-S 300mm and converter two weeks ago in the hope it would help me in difficult area as mentioned before.
I have been spoiled by 70-300vr, which means I notice I am not as steady as I used to think, but have notice I am getting better the more I am using it.
Apart from learning to become more stable in hand holding, even the new prime has hot and cold focus moment in same situation as 70-300 had. So I thought rightly or wrongly that maybe by upgrading to a body that was supposed to have better focus system, it would logically help me. Maybe you could set me straight on this please.