RE: Fletching
i use the two inch blazers on my goldtips, and i shoot the mx-3s, i haven't hunted with them yet, but so far, target shooting im impressed with how well they spin and how accurate they are. i've had feild point accuracy out to 40 yds with them. you'll be hard pressed to find a better head than the mx3 or mx4. in your setup i figure the 2" or 1 1/2" would probably hold up better, if your experiencing fletching damage, but if your 3 inchers worked well before i wouldn't change, "if its not broke why fix it"