Which balancer?

Recently had a chat with a customer that had a Chinsezium fliud damper on his motor.
Found a little piece of metal in the pan on the drain plug magnet.
Sent me a couple pics, looked like one of the rollers from the timing chain to me.

He pulls the cover, sure enough that’s what it is.
And more than one are missing.
We discuss the possibilities about how that happened, and I mention perhaps the damper isn’t doing it’s job.

New ATI damper installed along with new timing set.
His son races the car a lot of the time.
After the first pass the son comments on how much smoother the motor feels.

Personally, we haven’t reached a point yet where I’m comfortable with a Chinese Damper(or Chinese rockers).
I just won’t put one on a motor.