Hello Everyone
Very interesting to see all your experiments and experiences.
I live in the UK. I acquired some seeds from Steven Edholm (Skillcult) a few years ago. They were a mix of his potato onions - Kelly Winterton's included - which flowered and crossed with other onion types, including 'normal' biennial bulb onions of different colours.
Yr 1 I got a mix of colours and sizes, all single-bulb onions. I replanted these earlier this year and have interesting results. Some divided only, producing more bulbs. Some divided and flowered, setting viable seed. One divided and produced bulbils at the top. Where they flowered, the flowering stem still kept a firm storable bulb at the base.
Not sure what is going on with them but I'm keen to explore the potential!
I will get some photos when I can.