Discussion about the Korg PolySix synthesizer

Hi, I'm new around here and I'm a recent owner of a Polysix. (I don't 
speak very good english, so sorry!!)

I just bought it three days ago and yes, it's a machine to fell in 
love with. I prove the p6 and almost everything works but and I'm 
going to send it to a "synth hospital", because I don't know anything 
about electronics, so I want to ask you some things before a I speak 
to the "doctor", that I'm sure you can answer:

1.- It seems like some keys are out of tune within other keys, is 
that possible? Can it be tuned?

2.- All the keys work, but it seems that the sound goes "out and in", 
like if the thing has a shortcut. Is it a common problem, can it be 
solved?

3.- The arpegio, unison and one program buttons doesn't work 
properly, does the doctor need some new parts to fix the problem, or 
it can be solved with just a good cleanning?

4.- What kind of battery can I use to replace the one on my p6 (. . . 
that its kind of easy to find?

5.- One of the knobs is missing, where can I Find a replacement?

Well, it's about that what I wanted to ask you. I hope the "doctor" 
will make a good operation, because I really like what I heard and 
done with my new synth.

Thank You,


Fritz.