Help! Dampening bar not dampening evenly.
I bought a used Musser M7055G (An M55G mounted on a cart) and I'm very happy with my purchase. But I'm having a problem with the damper pedal. Dampening is not even. Left, middle and right sides do not damper the same way. The center is too muted while the left and right sides still have some ringing. I can't get it to have an even sound when pedal is not pressed.
The damper bar is perfectly straight, I have checked it multiple times. All posts are at the same height and have been checked with a straight long ruler. Can't find the cause or the way to solve the problem, I can't find any response in Google Search. Can anyone help me with this?