I figured that if I spun it very light lace weight, at least that would give me the most yarn to work with.
The thing with spinning with a fine wool like merino is that it's super crimpy. That means that, while I ended up with 406 yards of finished plied yarn, after it was washed and dried, it came to 377 yards of finished yarn (2,872 yds/lb).
Not knowing that got me into trouble a few times when I thought I had plenty of yarn for a project only to end up short
If I hadn't gotten bored, I probably could have gotten even more yardage but I'm happy with how it turned out.
Now what to do with it…