Single Voice mono mode?

As far as I can tell, the only way to use a monophonic patch with portamento is to use the MONO polyphony mode, but this stacks all voices which sounds all phasey and weird.

Ofcourse it sounds normal if the part is assigned to only one voice card, but using this thing live, I just want to be able to quickly load a program and use it without changing the voice card assignments (or midi channel)

I’m about to try add a ‘SOLO’ polyphony mode for this purpose, but thought I better check I haven’t missed something fist.