Danger! Danger! Danger!! I decided to just go for it, no life lines. Dove in, head first (sleeves first??) doing the sleeves two-at-a-time on the girl child’s sweater dress. It’s going pretty well, now that there is a little length to the sleeves. For the first few rounds I was questioning my sanity, it was a tangle of tips and cables and chaos. All is calm now. My tension is a little tighter, but my kid has little arms, so this is really a blessing.
Disclosure: I’ve knit two sleeves flat, on straight needles before. Back in 2008 when I was knitting up the Central Park Hoodie. This is more like knitting two-at-a-time socks, but with extra dangly bits.