The nice thing about getting down relaxed is that you leave yourself open to barely noticeable subconscious adjustments your body will make for you as long as you allow it to. If you rigidly adhere to 'make sure the cue touches this part of my chin' your body will execute that as well, whether that chin is placed in the exact right spot or not."So basically with sightright I am trading off a little inaccuracy in my vision center placement for a huge gain in accuracy in my cue placement".
i don't know if i fully understand this but i'm think i'm doing something similar and have seen better results.
basically what i'm doing is instead of trying to get down on the shot with the cue perfectly placed on the exact same spot under my chin everytime, now i'm getting down on the shot in a more relaxed manner without focusing so much on the exact spot on my chin that the cue is going to touch and without any tension.
could it be that when i was focusing too much on my vision center placement, as i was getting down on the shot,i was taking the cue to my body and not the body to the cue which was pulling the cue offline?who knows.
and could it be now that i get down more relaxed,i am able to place the cue more accurately on the shotline?
Sounds about right to me. Either this, or your chin doesn't always plop down in the same spot relative to the line as this takes a bit of precision in body placement. This is especially true if you aren't coming straight down with your head but coming down from an offset as you mentioned (if I'm interpretting what you were saying correctly). Coming down from an offset makes it easy for the exact final placement of the chin to wander a bit. Not only that but any time you are changing both levels and alignment of the eyes between standing and down on the shot, you have a lot of visual distortions to deal with that will bring some inconsistency into your perception and therefore performance. Pretty much every instructor recommends coming straight down for this reason.maybe where you thought under your chin was not really your vision center spot and now you let nature find it for you?
A tiny bit of offset is natural and expected when standing square, but once you step in with your left foot, that should pretty much get your head where you need it in your stance and you come straight down from there.