Patches and discussion for Ensoniq VFX family

Hi
Now it was a long time ago since I used my VFX and i have forgot what 
is the different between sd1 and sd2? I got sd2 but dont know what 
that means.
There is no OS for sd2 on EMU site or is it the same as sd1?

I also thinking about to sell my VFX but i have notice you always 
write good things about it so i change my mind,great guys  :-)

BR
Kenneth