Casio CZ/ VZ/ FZ - Pro Series

>However, recently the power jack has been acting a bit tempermental;
>it's a little touchy now. Not good. I was wondering if anybody else had
>similar problems, and if so, what had they done?

This is a common problem.  Possibly the solder joints have come loose- just 
re-solder them.  Or if the jack is bad, it's easy to replace.  Get one from 
a decent parts supplier or scavenge from something else.


>Also (and I understand this might be a bit of a stretch), but I
>recently acquired a Korg Poly-800. It's similar to the CZ-1000, but
>it's got a dedicated 3V watch battery inside, keeping the patches even
>when it's unplugged and there are no C or D cells in back.
>
>Is anything like this possible with the CZ-1000? I've scoured the web,
>but I couldn't find anything. What do you guys think? It'd make me love
>my CZ-1000 even more.

As far as I know the Poly 800 doesn't come with a battery.  It's fairly 
common to add as a modification but I think only the EX-800 and Poly 800 II 
actually come with memory backup batteries.  I don't think it would be hard 
to add a battery to a CZ but I don't know of anyone who has done it.