Korg Poly800/EX800 Users

Hey guys, 

I have a physically broken key on my Korg Polysix, and I would like to
switch it up with a key from my partially-non-working Poly800. Problem
is, I can't quite figure out how to actually remove the keys. Do you
have to bend the pins in at the end of the keyboard chassis, and push
the key out? Or do you have to pull apart the whole chassis? And if
so...how?

Any advice is appreciated,

- Peter