Technically, I agree with the canting idea of Harmless. However, if you work at windage with a vertical line or tape like I mentioned in my first post- your brain will lock in on the routine cant position. It is like any other sport; basketball, batting, etc. With little practice your brain will put things the same way everytime. And like a basktball player, after months and years, while your form (in this case canting) will generally always look the same, there will be those moments where you will need to cant differently (like the b-ball shooter needing to fade on his shot). You will find your natural ability compensating just like the skilled basketball player. Until then- just be consistent.