Finish the rebound first time. Time the run to arrive as the ball returns and strike it cleanly and low in a single motion.
As the rebounder one-two but strike the return first time, no control touch. Play it into the board, time the run to arrive as it comes back, and hit it clean and low in one motion. Angle the board so the return runs into your striking foot. Alternate feet.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.