[BarracudaHockey]

The output shafts shear off and the amplifers die from vibration. There's a warning specifically not to use them on anything larger than 30 size nitro. I'm not trying to spend your money, I'm trying to save your helicopter. A crash is going to cost you more than 3 decent servos will.

As for the grips, the bearings get play in the grips and it causes blade woof, so does slop anywhere in the collective system. As for the dampeners, replace them if you're the least bit unsure, they cost what, 3 dollars for the reds? Lube them where the spindle goes through with silicon dielectric grease.