If you are talking about the bolts that go into the feathering shaft, they should have thread lock on them. Make sure to clean the bolts and the inside of the feathering shaft with alcohol first to remove all of the oil. If you are talking about the bolts that go through the blades, they should be snug enough that the blades don't drop when held horizontal, but loose enough to drop if you give it a jerk. And not drop past 45º.
The heli looked like a hand full. Keep it up and you will get it in no time.