Patches and discussion for Ensoniq VFX family

Hi there,

Since a few weeks my VFX-SD had strange problems: when holding down a 
sound the pitch was varying randomly between around 1/2 and -1/2 tone.
The cause couldn't be some variations in electricity (I have a multi-
plug that is voltage tolerant). My first guess: let the machine heat-
up and that'll fix it !!
But then I got a message that looked like: low battery, replace and 
hit continue... Funny because in the startup tests, the voltage was 
quite high...

Anyway, I have few questions :
* Any similar experience ?
* Battery replacement issue: battery type ? special procedures (for 
soldering for i.e.) ?

Thanks for any infos,

Fred