GMMat,I don't know much about the marketing practices of bohning,what I do know is from my own personal experience through trail and error and for me helical is the only way to go when using fixed bh with traditional 4 or 5" vanes,the reason it is not as much of an issuie with the balzers is that they are much stiffer and higher in profile, although I still put as much a helical as I can get on them with the tools I have.And who says I am getting too much spin,I said I want my fletching to control my arrow in flight not my bh and the arrow spinning helps achieve that.