For more than 10 years, I have made and fished furled leaders, using the method of Claude Freaner. I have now made a fixture/machine to assist in the process.
The machine is hand cranked, so I no longer need to drag out a drill, extension cord, and stop watch. It has a mechanical counter to keep track of turns. Also, it has two parallel spindles, so I do not have to unfold the thread layout for the first twist, then re-fold for the furling.
The knob on top of the slider block locks it in place while the thread loops are made.
To date, I have only fished leaders made of fly tying thread. I find these completely satisfactory and durable. Once I tried using 2 pound test monofilament, but would get kinks during unfolding and refolding. With this improved tensioning system, I am now able to work with monofilament. Haven’t fished it yet.