Step 1: A couple of rows before the start of the heel flap, place 3 stitches that correspond with the instep and 3 stitches that correspond with each side of the the heel flap on a coil-less safety pin (I use the little plastic pins from Clover). This keeps the stitches on each side of the heel divide from stretching out as the heel flap is worked.
Step 2: Work the heel flap, heel turn, and gussets as normal. You can probably remove the safety pin after a few rows of gusset decreases, but I left it in for good measure.
Step 3: Remove the safety pins and marvel at how there is no hole to be found. Because the heel flap is worked in a contrasting color for these socks, there was a small hole on the other side where I joined the new color. But once I woven in the end, it disappeared!
I happily went on to finish the second sock of the pair.
Notice how there is a much tidier look to the top of the gusset in the second sock (on the right) than on the first (on the left), where I didn't use Sharyn's trick.
You can bet I'm going to use this simple trick on my next pair of socks.
Thank you Sharyn!