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Assuming you get/solder the correct cables, you can get 4 channels of CV out of the A4/AK, as you probably already know.
Apart from p-locking CV values, you can also use the A4 to effectively add up to an additional 2 LFOs and 2 envelope generators to this synth.
I would certainly also experiment with CV gate and V/Oct output from the A4/AK instead of using the built-in MIDI-to-CV, esp. with slides.
To sunnarize; experiment! 