baitwaister:
The need for a 13 ft board is based on having two pegs, 12 feet apart, as terminal pegs for the leader lay out ( equivalent to two furling hooks side-by-side), and with the requisite 'step' pegs in between. After completion of layout, as I interpret what you do, you start twisting at one end and twist to some point, at which time you double the one end back to the other, let the two legs come together, and then furl. If I am correct, this clearly means that you would need a board in excess of 12 feet to do a 6 ft leader, as you are laying both legs out in a straight line end-to-end. A 6 ft leg, times two legs end-to-end, equals a distance of twelve feet, plus additional to accommodate the extra thread length require to accommodate shrinkage.
If you use a mechanical twister and twist both legs at the same time, as I do, with both legs laying side -by-side, my board needs be only about 7ft long to accommodate the thread length allowed for shrinkage (6 inches for a six ft leader).
Believe it or not, doing the initial twisting in a straight line is how many have made their leaders; only bringing the two ends together at the start of furling!
aged sage