I'm not excited to re-do this all again (I assume that it would be pointless if I don't reflash the device?) but after all the hard work you have done how can I balk.
I missed the plan "ask" option and had not yet figured out that I should call MY partition mmc13.
The read me said that the ask:mmc option would make the bootmenu scan for available partitions so I tried that! (and I'm happy to say it worked)