If you use a fall away you can use as much helical twist as you can get away with. It won't hurt a thing & will only help with broadhead accuracy!
I generally use three 4" Duravanes with as much helical as I can get. I use a right wing clamp but it dosn't matter if it is right or left. I have also been experimenting with 4 flatch again & have found that a four 3" Duravane 3-D's with a helical twist makes a really accurate setup as well when using a fallaway rest.
I shoot 4" feathers on a right helical twist. The only way my beloved muzzy will fly true. As stated earlier, if you shoot a prong style rest, clearance will be an issue. I don't know the degree of helical, whatever a Grayling fletcher is, I think 6 degree.
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I adjust the jig to use as much helical as the shaft will allow me to use with still having 100% contact between the shaft and fletching. Different diameter shafts will take more or less helical. Basically the skinnier the shaft the less helical they will take.
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2 inch blazer vanes on a right helical will control your broadheads as well as 4 inch feathers on a right helical. don't believe me, ask 5shot.
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aka bucknasty
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Helical twist
