We worked in the indoor with Archie and Megan for a while at walk and trot. Then we went for a walk hack down to the end of the gravel road. Then we had some walk, trot and canter work in the prairie. I see what you are talking about with the right lead. He would rather take the left, so even if your timing is right, he waits a beat and takes the left. I carried a stick (ok, a boxelder branch that I snagged) and used it once lightly behind my right leg on canter depart for right lead and then he was spot on.