Well i just maybe a 75 year old weakling but I am struggling to cock this crossbow. Barnett tells me I need a BAR20030 and the universal won't work as it doesn't have the sled. I can't find one anywhere in fact Barnett doesn't show one on their site. If I though I could modify the universal by butting the sled from my hand cocking rope I would try it. I can get the thing cocked with the rope but the last few inches my hands are up to my chest and I am losing strength. Anyone know where I can get a BAR20030 crank or know if the modification might work?