To answer your 2nd question I bought a dozen carbon evolutions this year and could not hit squat with them . went back to aluminum an was dead on . the aluminums were even lighter than the carbons . I tryed all diferent fletch and point weight set ups and still could not get them to fly good . I think they are not as straight as aluminum or there was a big diferance in shaft weight between the arrows something was very wrong with them . and they were a pain to fletch also .