I washed and blocked my vogue bell sleeve sweater today. All the pieces are blocking except for the collar. I've got the first half of the collar done and am about to start knitting the second. It's knitted in two pieces. The pattern says to cast on for the first half, then when your start the second half you pick up stitches from the cast on edge. I just did an open cast on and then put the live stitches back on the needle for the second half. The collar gets attached to the sweater last, after the back, fronts and sleeves are already seamed together.