I'll often cant about 15*. Somewhat head position, somewhat firing arm geometry. And gravity helps compress leftward some of the body's natural spring rightward towards a more squared up position.
You've been building up the idea of consistency, so try to keep everything as familiar as you can. It may take a few matches worth of practice, but pull in tighter, sling up tighter, and try to put everything in it's usual place so it breaks in more to your form. Then relax the tension to a sustainable level for record, and make little adaptions of yourself to the coat. You may find you have to do the equivalent of pulling your pants back up over your waist to get the pads or extra material to not pinch or bind or flex when they shouldn't.