impressive data collection, pat. i'm really glad the two fletch works so well for you. i haven't tried cane yet. all my tests were done on store-bought, weight-matched shafts. today, i made six arrows with 4" banana cut feathers, 3 white and three natural barred from wild turkeys (top of the feather, which was left from fletchings i had cut previously). all with about 45 degrees helical. funnily enough they are noisier than my other arrows. i assume it's because the feathers are so soft, since the wild turkey feathers were louder than the store-bought white ones. they sounded like flu flus, but not as loud. and thanks to murphy's law, my digital camera died (can't charge it anymore, or at least it won't hold the charge)