Thought I'd update on my front-loading dandelion experiment - racked today.
The SG pre-sugar was 1.004 so I felt good that my numbers would be a decent approximation. I added sugar to 1.120, used 71B (14% tolerance), and let her rip! Today the SG was .998, we're approaching 16%, and still slowly bubbling though I don't know if it's off gassing or still slowly fermenting. Guess I'll know for sure later.
There was a bit of sweetness and I really liked it! I back sweetened some left over, smoothed it out, but the astringency is noticeable. My gut (and mouth) tells me I probably won't back sweeten at bottling time. I'm glad I tried the process. In fact, I'll have to do it again!