RE: Fletchings...?
Apart from the obvious, you can't fletch left wing feathers, right-helical and vice versa. I'm a lefty and I shoot right-helical... mainly because I have a right helical fletcher. There was a theory that thefletching should spin the arrow away from the bow. Therefore If you are right handed, you needed to shoot left-helical, etc. Frankly, at least for a recurve,I don't think it makes a difference.