Best balancer under $250

I used a fluidampner on my engine and was always at or over 8000. Very Smooth no vibrations at all . Engine had 8 years on it.

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So, I've always wondered, can the Fliudampr fail? Have you ever seen one fail? I have not. And I mean the name brand, not a knockoff. I think if anybody has seen one fail or tore one up, you'd know about it.