I am working with stash yarn - wonderful natural merino from the (now defunct) Juniper Moon CSA. It measures about the same wpi as Shelter, but I still had to go down to a 6 needle to get close to gauge. I did a swatch and loved it but decided at the last minute to switch my colors, So I started with a sleeve to be sure of both my colors and gauge. So far, so good.
But this knit is no Stopover! I really struggled with the rows with three colors. Any hints? How does everybody hold that third strand?