CP70 sustain 'click'

[4kinga]

Hello all!

My CP70M has developed a pronounced 'click' when the sustain pedal is pressed.  Velocity of the pedal being pressed does not seem to effect the click.

It does not occur when the harp is not attached and the pedal is pressed.  I've inspected the wooden 'lifter' and I do not see any issue.   I also cannot hear it when I lift the dampers manually on the hard.

With the top open, it seems to be coming from the bass register.

Does anyone have any ideas on what might be causing it?

[pianotuner steveo]

Sorry I'm just seeing this now. Did you find the issue? Was it a missing felt piece?