I absolutely love love this jumper. There is quite a bit of knitting, but so worth it. The wider arms allow for many layers underneath, I reduced the neck ribbing by half as high necks don’t really work for me and eliminated the side splits as I tend to get them caught on everything.

Other gauges
Scallop Stitch 19 sts and 27 rows on 5mm needles
Twisted Rib 17 sts and 23 rows on 5mm needles

Modifications
No side splits
Cast on 195 sts crochet cast on eliminating side splits
Set up row from centre back, k1tbl, p1, 1tbl, K41, k1tbl, p1, k1tbl, pBORm, p1, k1tbl, k1, m1 k96, k1tbl, p1, pm, k1tbl, p1, k1tbl, knit to last 3sts, k1tbl, p1, k2togtbl with last stitch of row and first stitch. Slip back sts to BOR marker, rejoin yarn.

Sunday short rows at shoulders and three needle bind-off.

Knitted only 12 rows of rib for the neck.