Step 18: Finishing the overlay
After 1.5 feet, go to 8-plait. 8-plait is, just like in the belly, U2O2 every time.
Again after 1.5 feet, go to 6-plait. 6-plait is the same as with the belly. You should have 6 strands as you hit the belly. When you get to the very end of the belly slip all 6 remaining strands through the fall loop. Start half-hitching them in alternate directions, around all the other strands and the main part of the fall. After 6-8 hitches, cut & seal all but the bottommost strand. Take that one up through the fall, pull the fall down nice and hard, then cut & seal that strand as it sticks up out of the fall loop. Roll the thong under the board. Get it nice and smooth. If you pulled tight enough nothing should be loose.
The last three pictures show a 12-plait, and the irregularity of the 10 plait.