I would think that new felts and skins would ease a good bit of that slap back. Or a higher grade of rods, wood, and screws. In my mind, it's a got dam conundrum that those rods/screws would come apart just from hard button pressing and releasing. Are you sure there's no young kids messing with your accordion? Because I know first hand, that when you put your accordion into the hands of a toddler, the first thing they go for are the flappers. They love to catch one or two of them and push, pull, or bend them for some reason. "You're never too young to learn Cajun accordion"?? LOL, yes, you can be too young to learn Cajun accordion. That's why the old men dared us to touch their accordions. Didn't want us to mess them up. There's two kinds of players.....wild or smooth. If you choose to be the wild player, be ready to spend a whole lot more money to keep your accordions playable. Ok grasshopper? LOL. Or, you can learn to play the drums, symbols, or the cowbell.