Discussion about the Korg PolySix synthesizer

As part of my polysix 'refit' I'd like to replace
the red led's with blue ones. Is this likely to be 
a problem - I'm assuming the red leds are fairly 
standard size and voltage?

The switches seem to have a built in led, and I wonder
if its possible to replace those at all?

Anybody given this a try?

Ian