ERRATA: For Neck Shaping the pattern should read:
work to specified # of rows then place marker in center ch-2 sp
Row 1: Work as est to marked sp, dc in marked sp, turn.
Row 2: ch 3, sc in 2nd ch-1 sp, ch 2, sc in next ch-1 sp, work as est to end.
Row 3: Work as est to last ch-2 sp, sc in last ch-2 sp, turn.
Row 4: ch 3, sc in 2nd ch-2 sp, ch 2, sc in next ch-2 sp, mark 1st ch-2 sp just created, work as est to end.
Rep rows 1-4 twice more for neck shaping.

The Join Back of Neck and Sleeve shaping and Back should read like this:

JOIN BACK NECK
Next row (WS): Work as est to end of row, ch 42, then work as est across Right Side of Neck sts.
Work evenly as est across all sts for 12 (16, 16, 20, 20) rows.
Fasten off.

BACK
With RS facing, join yarn with sl st 2½ reps of Lace pat into the fabric, or at 1st body (non-sleeve) st.
Next row (RS): Work as est across 5 (6, 7, 8, 9) reps of Lace pat, turn.
Work evenly as est for 35 (35, 35, 43, 43) more rows.
Fasten off.

IMPORTANT MESSAGE: if you change the yarn you should try to get a yarn that has the same properties as Alpaca or your garment will NOT turn out right. Most likely it will be too small and tight!

Yarn: Blue Sky Alpacas Mélange (100% baby alpaca;
110 yd 100 m/1¾ oz 50 g): #804 cinnamon, 7 (9, 12, 14, 16) skeins.
Hook: Size F/5 (3.75 mm). Adjust hook size if necessary to obtain correct gauge.
Notions: Stitch markers (m); yarn needle; 1½ yd ⅜“ wide grosgrain ribbon;
eight ¾” decorative buttons.
Gauge: 1 st rep = 3¼“ in lace patt; 1 row rep =3” in lace patt.

Here are a couple notes: The entire sweater is made in one piece! (pause for a cheer) As for the fit, it is meant to be a very tight fitting sweater and because it is made out of alpaca I wanted to make sure it wouldn’t stretch out of shape after wear (you know what I mean?) Also, because I wanted the lace to really get stretched across the body (and boobs) to show the stitches and not look like a blobby mess…does that make sense?

I say all of that to let you know what I was thinking when I wrote the pattern.