This hat has 84 rows and you slip the first stitch on every row. Allowing for the cast on and cast off you therefore have 44 loops up the edge. I picked up all these stitches for the crown and didn’t bother finding the other 22 required for a 66 stitch round on the crown.
It sits very nicely, the extra stitches are certainly not required. To account for the different stitch count I started with k8 k2tog (skipping the last decrease in round 1) and didn’t do any decreases in rounds 2 and 4. This meant that I had 10 rounds, the same as the pattern and a 5 point star instead of a 6 point star.
I was a bit concerned about having a seam in a hat so instead of casting off I picked up a stitch from the cast on edge with each stitch and knitted them together; the same as you would do with a 3 needle cast off but picking up one stitch at a time.
As the wool I used was thicker than specified the depth of the hat is a bit bigger, this means the cables are not as stretched out as when worn which I really like.
It is currently drying on the glass head, a really good thing to have for hats containing lace. No playing around trying to find something for blocking.