i'm actually using the bent press to re-stabilize my shoulder, though. since the KB has the weight on top of my forearm extensors, it increases involvement of whichever muscles pull my arm in the opposite direction to the one in which the shoulder subluxes. might be worth looking into, even if only with really light weight at first. you can also use just the basic motion of the high windmill but without weight, since for hamstring stretching you just need the hip joint angle (which would make it a dynamic stretch). or you could do low windmills, but those have reduced range of motion and are therefore fail.