I might also try leaving the center bundle where the shoot would come from on another good root and see how that works. Better to experiment while I still have onions coming than when it’s too late to waste any. <<<
That is an excellent idea.
The article that I read, said a pot of roots gave her a steady supply of onion tops, she did not mention round onions, or I forgot if she did.
Well I put the first one down... with the roots and about 1/2 inch of onion attached. We'll see.