It was one of those “ah ha” moments, after a lot of fumbling and cursing, but it really is a calk walk. Suppose I want to make a 14 strand Flemish string. I measure out 7 fibers of B-50, and then wax both ends of the fiber bundle lightly, a bit past where I want to begin twisting the loops. Then, I measure out another set of 7 fibers, waxing the ends.
I hold both bundles together with my left hand, just past the point where I want to begin the top loop. One set of fibers is on top of the other, all untwisted at this point, and separated with my forefinger. I twist the top group of seven fibers AWAY from me (clockwise) between my thumb and second finger, a couple of twists.
Then, I pull that twisted bundle TOWARD me, counterclockwise, across the top of the second set of 7 bottom fibers. I pinch both fiber bundles lightly with my left hand, and then, twist what is now the bottom set of fibers AWAY from me, clockwise, a couple of twists. Then, I pull that bundle toward me, over the top. Do it over and over again, and voila.
I twist until I have about 4 inches or so of untwisted fibers. I make the loop, and repeat the process, this time twisting the 14 fibers away from me, then across the already twisted string. Repeat until you have your finished loop. I don’t usually make a bottom loop, and instead tie the string on the bow with a bowyers knot.
Using two colors of B-50 can help see what is going on, and looks cool, though I use mostly one color, brown.