The 'Jesus' bolt of my R60 sheared and the pictures below show the resulting consequences. Thankfully no one was around when this happened and that the heli wasn't airborne. As it was it sounded like a gunshot when the rotor let go. The one rotor blade and hub travelled about 75 yards one way and the portion of the other rotor blade went about 50 yards in the opposite direction. I suggest that if you have an R60 you replace this bolt with a 4mm shouldered bolt. The R30 main blade bolts work very well.