I used to think those cranks were a good idea until I actually got a crossbow and found out how easy it is to cock one. Unless a person has a bad shoulder problem etc. I would think they are more of a nuisance than anything except if a person really needs one. I use my rope cocker to unload probably more than cocking. I've read that you should use the rope when you cock it to keep the string loaded evenly. I cock mine by hand sometimes and it has always shot fine after that. What model is the Excalibur you are selling HM??