Despite my best efforts, my yangmeis didn't make it, even the rootstock. I chalk it up to being really hot and dry where I live. If I tried to spin the wheel again, I'd definitely employ a humidity dome and humidifier like Spaugh and Simon used - clearly helped since both of their success rates was statistically better. Nate in SC also probably has a more mellow climate than mine, so, definitely not an easy task up here at high elevation inland CA - but I did my best!
I'll leave them sitting for awhile and see if anything comes from the roots but am definitely not holding out any hope.