I believe that Blazers weigh about 5 gr each for a total of 15 grains. Three 4" feathers weigh just about 10 grains. The weight savings is minimal.

Feathers might be worth a try just to see the difference in flight control, especially with those large broadheads. If you fletch your own arrows it's kind of a no-brainer. Gain knowledge from hands-on experience.

By the way Blazers are VANES. Veins carry blood.