Hello,
I made a basic Max for Live patch to control program change and the DCO/VCF mod parameters.
I think it's kind of not well known that these can actually be automated in realtime via MIDI.
I have an EX-800 but according to a service manual for the 800 II it receives the same 2 midi CC messages so I'm assuming it will work.
Whenever I finally receive my hawk-800 I hope to do a full editor.
Device can be found here
Korg Poly 800 MKII and EX-800 Program and Mod version 1.0 by JoeM on maxforlive.com