This sweater is a challenge, both technically, and for the persistence it will take to finish it. It is, for now, my magnum opus. I am making progress, and I am figuring things out–I think. There is puckering in the lower color section. That section uses a stranded background with intarsia color blocks. My challenge has been to figure out how to prevent the puckering as a color doubles back on itself. Typical intarsia has you wrapping the two adjacent colors as they head off in their separate directions, thus holding them in place. If the background color is stranded, that doesn’t work. The lower arrow shows where the pucker happens,…