If it ain't bust, don't touch it IMO. Inspect it carefully: if showing signs of detaching itself, then replace :)
 
The condition of the VCU is more important than the condition of the mass damper. Do the one wheel up test and check it's OK. ;)
 
I've used strong silicone sealant to resecure a damper that was looking dodgy. It lasted for years.
 

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