Please don't take this as argumentative because I don't mean for it to be. I am not any kind of engineer or physicist (lord knows), but I cant see how string angle wouldn't come into play. Yes with only 2 inches of deflex you minimize that, but the tips still start behind the handle by 2 inches. With no reflex the angle is there to some degree, and it gets worse as you draw the bow. Early draw weight might offset some of that, but wouldn't early draw weight AND some reflex, like the Duoflex for example make for a more efficient bow?