I repainted the ribbon cover on my Studio 44, and instead of using peel and stick felt I bought some very thick felt from Joanne's Fabric made from recycled plastic bottles, and epoxied it on. It's about three times as thick as the peel and stick stuff, and muted the sound noticeably better than the original felt, which was about the same thickness as the stuff with the adhesive backing.
“Don’t be too harsh to these poems until they’re typed.
I always think typescript lends some sort of certainty:
at least if the things are bad then, they appear to be bad with conviction.”
~ Dylan Thomas