I fletch wood arrows with glue on nocks. I cannot see a difference, looking down the fletched shafts, between the orientation of the RW vs. LW in relation to the index on the nock. In other words the nock index is centered in the helical curve of the feather with either RW or LW even though I'm using the L indexer.
After I posted this, I realized I had posted a similar topic last fall. I really didn't get a definitive answer then. I guess I won't worry about it if the arrows are shooting well.
All I know, is that I really like the job the Bitz fletcher does versus the Jo Jan I had been using for 15-20 years. The Bitz clamp does a super job of holding the feather and the jig is extremely precise making for a great bond of fletch to shaft.
Mike