Those are really nice looking two fletch arrows. Very cool ! I haven't tried that version, but I like em. I have made a different version of two fletch arrows for many years. I was told it was it was an Eastern Cherokee style. I am new to this forum so don't know if you have talked about them. It is easy to do in a primitive setting, do not need a third hand, stabizes the arrow quickly, and makes use of two secondary wing feathers. The shaft is basically sandwiched between two feathers, with ends of feathers secured with sinew and hide glue. The arrows make a fluttering noise like a flu-flu, are faster than a flu-flu, but slower than 3 fletched arrows.
Dustbaer's 2 fletch arrows are much nicer looking, quieter, and probably faster than mine. I just thought I would mention another primitive type that I have had good luck with. If there is any interest I can round up a closeup photo . There is a photo of a few of my primitive arrows including a couple 2 fletch arrows on the Primitive Skills/ "Life is Good (up in the Northwest)" thread on page 7.
Allen Minton