The C4 isn't particularly suitable for the larger chassis. The larger chassis is great for modeller type of effects like the Nemesis. The big central 15 way encoder knob controls the different model engines, not the patch selection. So a pedal like a C4 isn't well suited to that UI because it doesn't have any modelled engines. To control each of it's 4 oscillators and other deeper functions, it would need a completely different chassis.
What i do with my C4 and Ultrawave is I expand it's knobs by using a FaderFox PC-4. I basically get an array of 24 knobs that I can assign directly via Midi CC to any function that the C4 or Ultrawave offers via midi CC. The resolution of the Faderfox PC-4 is fine for most uses.
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