First, I finally cut off the extra cord from the toe, burnt the end, and used rubber cement to glue the cord to the sandal. I made sure the hole was located so it would have minimal contact with my toes when they move around.
From this point, I started with the standard lacing through the rubber. Note that I have moved the inside ankle hole about 1/2″ toward my heel from my initial try.
Then I ran the cord over my foot and under the back strap.
Then I ran the cord back over the top of my foot (and above the previous strap) and under the back strap on the inside of my foot.
Then I ran the cord back over the top of my foot. This time it was below the two previous straps, to form a single thick strap.
Next I ran the cord under the toe strap and though the hole between the toe strap, heel strap, and rubber.
Then I ran the cord around the back (under the previous back strap) and though the hole between the cord and rubber on the inside.
From here, I snugged everything up and tied the cord off to the toe strap.
Note how the second back strap helps snug up all the cord.
