Your "tech" doesn't have a clue. A Blazer vane has less surface area or smaller side profileand thus is less effected by a side wind. The vane being slightly taller gets more vane farther away from the shaft/broadhead into less turbulant air for better control. The less turbulant the air is the ore control the broadhead will have over the shaft. Think about driving a car behind an 18 wheeler in the turbulanceand then driving that same car in "clean" air.