UGH!!

So I am now working on one of my most critical and remaining riding position flaws. My pelvis has a slight rotation to the left, which pushes my left leg back and my foot tends towards tippy-toes - and then my less flexible right/hip and leg move forwards relative to that left leg.
I am doing steady simple work every ride with Amigo, so I can really pay attention to my position to ensure it is straighter (even if not perfect, I want to be at least reasonably straight). But when I straighten myself out now, it feels sooooo wrong. So much so, that even though I know I have corrected it, I feel quite convinced I cannot possibly be straight so I keep looking down at my body all ready to correct something - and even though I feel all crooked, I am not actually that crooked. It just feels AWFUL!!
I wonder how long it will take to get rid of this muscle memory? Any ideas anyone?