With a lot of work and awareness of my leg, we're finally traveling straight down the center line and are able to get a square halt. However, as soon as I salute, Primo swings to the Left (most of the time). It's not a little step, we're now facing the corner to some extent.
He does can't his hind quarters to the left given the option, so I have to have my leg back slightly to keep his butt in line as we prepare for the halt. How do I keep him that way through the salute? I've tried carrying a whip, tapping with my heel, and some other rather visible cues and nothing seems to be keeping that hind end from moving a second or two after the halt.