I have been using just the regular beman ICS 400s and I see thatBeman has these new arrows. They are called Blackmax MFX400s I guess they are supposed to be smaller in diameter, but thicker walls?? Anyway has any one shot these are they worth switching to? Does the arrow speed increse,penetration and better wind resistence. Also will I be able to use my Aizona EZ fletch on these?? Thanks guys