In my experience, I've fletched 1000's of arrows at the shop I go to,and the blazers in the helical clamps don't make a huge difference. Offset is the way to go there IMO. As for me, I shoot 4" vanes, with a wicked helical. I use a right helical clamp, and have it offset as well, getting as much twist as I can and still having good vane adhesion. I feel that it greatly aids in broadhead flight, and there is so much spin, that broadhead doesn't stand nearly as good a chance at steering the arrow.