First year crossbow hunting. Bought a Barnett to see if I stick with it & then move up to an Excalibur or Ten Point. I installed the cocking device on the Barnett & it has been nothing but trouble. The spools that house the crank string don't move in unison. One will retract while the other is letting slack out. Finally took the device off tonight. Am I using this wrong or is it just worthless?