Thanks heaps for the reply. That would be a good setup for sure, but I'm really only looking for the simplest thing possible (it's basically just to add one small as possible VCF freq knob for tweaking live, I already own a pg-300 clone but don't want to have to carry it around when literally all I can really use live is the vcf freq).
Anything I would need to look out for if tackling this, would I basically be able to use the Core module, Midi out port and an encoder? (obviously not as simple as that but just want to check if I'm on the right track before I get lost in the depths)
Cheers :)