Most vanes don't play well w/ others. And w/ some of todays more rigid vanes, ie, Blazers, you will most likely shoot them off before wrinkling or tearing them. I've heard and seen horror stories of the durability of the Quick Spin and given that, I just wonder how much spin is really necessary. Have you shot them through a chrono and done any speed testing? I'm only guessing, but w/ that much rotation I'm thinking the speeds would drop off faster. I have also heard what you mention.....they group very, very well. I know you shoot a Zero Effect, but of the people I know who have shot them through a WB, they don't last long at all. Let us know about any speed testing you do. I would be interested in that.