RE: arrow fletching question
I think mainly weight is the biggest difference in vane's ,I found the blazer's to be the lightest and the toughest vane I've used .The blazers also will stabilize your arrow as well as a 4"vane at less weight on your arrow .Now as far as right helical or left helical ,this is just which way you want your arrow to spin ,I've only ever used right helical and straight with a bit of an off set ,as for how it improve's your arrow flight I'm not really sure ,so I'll leave this one for someone else to answer ,it's also a question that i would like to hear the answer to.
nubo