Discussion about the Korg PolySix synthesizer

Hi,

A couple of the key switches on my board (bank, program, arpeggiator 
type) are a little squishy. One is actually quite tempermental. So 
I'm thinking of replacing them. So what should I replace them with? 
The switches have a removable keycap, an led, a chassis, and what 
looks to be a tactile switch built in. Should I replace the entire 
switch? I've seen a couple of "current" switches which look very 
similar, but... 

I've seen 12mm square tactiles mentioned as valid replacements, but I 
can't figure out how they would work. Do they fit inside the little 
keyswitch chassis somehow?

Thanks,
fargap