Sleeve modifications:
Knit in the round on US 10.5
picked up 2 extra stitches under the arms.
knitted one round in stockinette
decreased ssk/k2tog 1x
worked even for 5 more rounds.
Followed pattern from this point.
Lengthened sleeves to 7” from underarm.

I-cord:
US 6
2”

Used embroidery floss to sew on a shank button