At V1 I drop my hand behind the throttles on the throttle quadrant and put my pointer and index fingers against the base of the throttle levers. That way I can feel any power changes.
FO, all 100-105 lbs of her, flies with one hand. How can someone so tiny fly with one hand while guys 2-3x her weight can't?
Tailstrike avoidance? Myth IMO. I doubt the afore mentioned FO can rotate as suddenly with one hand as a 200+lbs guy can with two hands.