Knit as per patt, except for one thing:
On the collar shaping, I wrapped the last stitch before turning my work. Then on the way back, I worked the wrapped stitch as per Cat Bordhi. That is, when I got to the wrapped stitch on the left hand needle, pick up the wrap (with your right hand needle) up and over onto the left side of the stitch that’s wrapped, then work them together as one. Worked beautifully.

Sulka knits up like a dream! Used all 14 balls as called for.
(4.5 balls used for back, about 5.5 balls used for fronts and sleeves, about 2 balls used for each collar)

When blocked, the finished sweater definitely grew in size despite my care of handling it, but I think it’s to my advantage, especially in length since I have a longish torso.