I'm suprized that not 1 person has asked what type of fletching jig/clamp you use.
I have not shot anything but wood arrows for the last 7 years or so (with the exception that THIS year I hunted with re-fletched aluminium XX75s that belonged to a friend of mine who passed away in Sept.) and I have NEVER had a problem with poor arrow flight,(grouping is another story but THAT is MY falt LOL)
First let me say that I do not make my own arrows.I buy my arrows custom made from Joe Skipp at Renegade Archery.Joe is a sponser here on TradGang.
Joe uses Bitzenburger fletching jigs with a VERY pronounced helical twist (I'm not possitive but I believe it's an 11 degree helical clamp) Joes arrows spin like a top and fly like a bullet!!!!! Also,I have NO problems with windplaneing broadheads.I use 2 blade Zwicky Eskimos and old green Bear Razorheads without the bleeder blades and I mount them horizontaly,they do NOT windplane at all.
Also,not all of my arrows are perfectly straight LOL.I buy a couple dozen arrows a year from Joe and right away the new arrows get stuffed into my backquiver.I try and use "newer" arrows for hunting,and after the dozen new arrows gets thinned out from being lost or broken the remaining arrows get stuck in a 5 gallon bucket for stumping and 3-D shoots.By the time my arrows are ready for the "graveyard" some of them are about as straight as a corkscrew,BUT they fly as "straight as an arrow" from the day Joe makes them till the day they die!!!!!