Nice first................turtle has heard some of us on here making comments that turning the feathers back side out makes the feather lay on the shaft a little better.  I really like "two fletch" using tail feathers as you did.  There real quiet.......I just happen to shoot some today at a Trad shoot that some of the boys on PA went to.  
Again, real nice arrow.  I use a real fine silk thread sold in fly tieing shops.  But that not really necessary, any real fine strong thread will work.
DBar