I'm using a Doepfer A-138b for audio (which is tight for my smallish 2x84) and a Ladik M-120 which offers 3 ch of bipolar CV mixing and offset, too. I myself learned about that the hard way e.g. , got a fancy quad lfo, then found out that its full CV swing is rarely useful. Many ch of CV need many ch of attenuverting/mixing.