21st Century Sanford Man (2021) is a truly fundamental way to work on double beats and to connect double beat fundamentals to the doublestroke roll. Segments of the exercise must be performed with a “maximum rebound” (or “pause at the up”) approach, whereby the performers focus on allowing every stroke to return to the attack height and simply stay there before the next attack. This extreme approach to emphasizing rebound allows performers to work through their issues in maximizing both rebound and velocity (sound production) in both double beat and doublestroke roll contexts.