i just posted a similar post..Lol, thats weird. Anyway, i am pleased with the Nap vanes. The bright green is my fav, especially in lowlight conditions. Now to your question. I have made three different arrows with the naps, all using carbon arrows. I did one straight, one offset, and one right helical. I have to say, the offset and right helical work the best. But unsure on the whole question though. Are you putting them on right helical on the arrows, or what? Hope I can help, cause these vanes are great.