Auto Center Weak in One Direction

Recently picked one of these up used (only way to get them today, obviously), and the auto-centering function seems to work very weakly when I pushed the joystick forward, or not at all. I'm assuming there is some mechanism inside that needs to be cleaned/fixed/replaced. Has anyone done a teardown of this base, or repaired the Auto Centering/FFB mechanisms inside? I'm assuming most of the parts inside could be ordered and/or 3D printed, but I don't know where to start.