According to my pro shop owner, speaking the blazer manufacturer, the Blazers changed their base last yr and there have been many complaints because of it. They added a groove to accomodate the big stores machines. the problem is that they are pulling away from the arrow after you fletch it, because we can't put on the same pressure as the machines. The groove is V shaped. Blazer manufacturer is apparantly changing the base to more of a U shape to match the arrows. Just what i was told.
Well I went out and bought some Fusion vanes to give them a try. About to do some fletching. [Update] Well I do like the look. Now I just have to see how they fly. :d