I've been trying to learn some basic boxing alongside BJJ. I do pads and bags with my trainer. Seems like when I just concentrate on my feet my jabs and hooks just flow from them. I just think about my where my feet are and the rest works. When I start thinking about my upper body movement I overreach, lose my balance or raise my back leg. Even head movement goes better when I just think about my feet. Am I right to center mentally on my feet? In a pure boxing context.