Hey guys so I bought this Crossbow off a coworker for $60. I am pretty new to Archery in general minus what they taught us in Ag and PE class. By visual inspection everything seems great! Only complaint is the Acudra string pull, Sometimes it doesn’t retract all the way. My only real issue is I can’t seem to find anything about what grain bolts I should use. If I even worded that correctly lol. And has anyone done anything to these to make them a better crossbow? Like different limbs, hand crank, better scope or anything like that?