Of course for my machine running 2 steppers per axis having the tensioner spring in between the two steppers opposite the side the heatbed or extruder are on just sets a preload before the stepper motors are energized. And then there is no elasticity as I am pushing on one end while pulling on the other and vice versa. Really I can't believe more people haven't started running 2 steppers per axis. But I am proud to be one of the few.