Universal bale spear, I am looking at two at the moment.http://www.agstore.com/hay.html?gclid=CMb0qbyRmqYCFcnc4AodggySnA . The two I am concidering are 831150 or 831160 stock No. on web. site. My question is for those that know about bale spears give me some advice on which one or a nother one. Thanks in advance.