A dual-channel version of Polyvoice 2, with a split keyboard and two synth preset panels, is now prototyped in Ula 1.2. I learned quite a bit about resets while making this, so I'll post some details about it over the next week.
here is the top-level structure. The reset design permits connnection of the top-level blocks in any order, so there's no problem with rerranging the pnael.
A download is available.