I’m ready to sew in sleeves on a baby cardigan (Mr. Bumble from Knitter’s Winter 2004 - stockinette stitch). The body is knit all the way to the arm hole. Should I do this right sides together? Mattress stitch? Directions had me bind off the edge of the sleeves but the armholes are shaped and shoulder seams are joined with 3 needle bind off. I’m confused. Is it a good idea to pin this together the way I would with a sewn piece? I really just don’t know where to go with this.
Thanks for any suggestions or links.
p.s. I’ve never seamed in anything 3-D before on knitting.