Went down a needle size to US00.

Worked mostly according to pattern except:

Leg
2 pattern repeats (48 rounds).

Gusset
Round 1: Pick up and knit 21 stitches for needle #3.
(The extra 1 stitch helps prevent a gap. It also makes for an equal number of stitches on both needles #3 and #4--31 stitches each.)

DO NOT DECREASE on this round. (101 stitches total.)

Round 2: Knit all picked up stitches through back loop.

Foot
2.5 pattern repeats (60 rounds).

Toe
Setup: Knit to end of needle #4.

Round 1: As written.
Rounds 2-3: Knit.
Round 4: Decrease.
Rounds 5-6: Knit.
Rounds 7, 9, 11, 13, 15, 17, 19: Decrease.
Rounds 8, 10, 12, 14, 16, 18, 20: Knit.
Rounds 21-24: Decrease.