Also, keys are easily physically swapped, just popped them from under gently, 95% chances the plastic cap will detach from the bouncing mechanism (two plastic~handles crossed above a latex ~cushion). Reattaching is just placing the cap on top, pressing down smoothly and plastic dents will match again.

ps: I said 95% because there was a few times where the underlying handle/cushion came with the cap and fell apart. It's possible to fit them again but is a bit challenging because of the tininess. So if you try, be warned.

Thanks. I'll take a look.