AS you probably know, i have an antique ludwig and luwdig vibraphone. The dampener bar is about 2 inches deep and creates a lot of noise when pulled down. We think it may be the springs, but are not sure. There is 2 springs, one on each side. Is there anything else that will quite the dampener? We tried putting pieces of felt underneath and above the bar. That did nothing. We are going to try some oil. Will changing the springs reduce the squeaks? They are original and are 60 something years old. Maybe they are rusty.