Ken,
According to the HC rules, 4 inch vanes or longer must be used. The Easton Diamond Vanes are advertised as 375 (or 3 3/4" ), however AAE Plastifletch' s are adverstised as 4" , but are only 3 7/8" . If I' m reading your response correctly, the rule should actually state that 3.75 or longer....correct???

Just don' t want any of my customers getting in trouble.

Thanks,
Jim