Experienced rifle hunting but never bow hunted. About to buy my first bow today, Mission Sub-1 XR. They sell separately the crank for cocking/decocking. My question is rather I need it. It doesnt seem very hard to cock with the manual rope. Isnt it easy to use the blunt arrows to shoot into ground to decock? Ive heard it may theoretically be a little more accurate to use crank to cock since it insures even distribution on the pull back. Any advise?