As far as making a shift function on the Super 6 for it, I suppose if there was room on the memory you could have up to 5 alternate tunings on the machine, and use Shift + Mode (on arpeggiator) to scroll through the 5 tunings, assuming there is no function already tied to shift + Mode that I don’t know about. I’m not knowledgeable or particularly invested in microtuning myself but I presume that’d be enough for an average performance.