Yamaha MOXF8 noisy action

I am having keyboard action problems on my Yamaha MOXF8. The keyboard action has softened up in the middle register. About an Octave and a half. The keys are noisy and Too mushy feeling. I replaced these keys myself years ago and this helped the action just a little. I know that there are some felt strips inside the keyboard that can be replaced. I suspect this is the cause of my issues. I’ve searched for years for a service technician in my area (US zip 29206) but no luck! Thanks for any advice!