ORIGINAL: Heliko
The blades can't be tightened too much. They have to be able to Lead/Lag. If they can't as Oster said the heli will vibrate.
FP's do OK with tight blades, buy they usually vibrate and wobble so much anyway who can tell.
Ha, you know, I thought about tracking and balancing my HB-FP3, but then I thought, "why?"