Superflux "clicks" with sudden changes in current

Running into a weird problem and can’t seem to get to the bottom of it:

Whenever there’s a sudden change in current the Superflux “clicks”. Not a crunching, but feels more like the startup click. It’s really evident when rocking back and forth.

I’ve checked all the bolts and screws are nice & tight, and messed with observer gain, motor resistance, etc and no change.

Anyone have any idea what to look at?

Other than this weird “click” the Superflux is performing really well :slight_smile:

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FYI, the inner bolts of the rail mount were loose. Tightened 'em up, good to go!! :smiley: