large arrow companies (or small) all fletch their arrows generally so that the fletching offset is opposite... they fletch them so that the helix is opposite to the way the feather naturally curls, which when they do it makes a really nice fletch and is how I've tried to fletch arrows for quite a while, they normally look good... but fly like s*** although the store-bought ones I have fly pretty good.
Now lots of fletching I see on here people fletch their shafts so that they just follow the natural curve of the feathers, they seem to have good luck with this....
and then the only good arrow I ever made was straight fletched... but it still wasn't quite perfect
I really want to start making my own arrows, cause I'm tired of the big archer companies, and tods arrows seem awesome but I couldn't afford the fletched ones, I could the shafts probably....