I have a few Goldtip hunter and XT's arrows I shoot. I'm new to archery so thats why I dont know the answer to this question. I bought them already having #3 4" vanes with insert and nock already on them. My question is, the duravane fletching that comes on them, is it considered a helical vane. the vanes do have a right twist but another guy I talked to says they are not helical because they dont have "enough" twist to them. I'm really confused, could someone please help me out on this?