Do I need to replace this KD120 foam?

It’s from a KD120 I got on eBay, prob 20+ years old. Still plays well as this foam isn’t the trigger it’s just the beater backing. They seem to cost around 50 to replace, will I even notice a difference? Lmk what you think

It’s from a KD120 I got on eBay, prob 20+ years old. Still plays well as this foam isn’t the trigger it’s just the beater backing. They seem to cost around 50 to replace, will I even notice a difference? Lmk what you think