I decided that being part of the early development process for norns would eat far too much time I could otherwise spend dreaming up esoteric sequencer apps for Teletype… oh, and making music 
I will post the “schematic” for the switch this week. It’s really just a 4P3T “break before make” switch with some jacks and normalizations. It’d be cool to make a powered switch with footswitch control someday.