fwiw, an interesting, but true fact ...
the ifaa used formulas and measuring devices to make sure all competitors were using CLASSIC "D" braced ENGLISH ELB or HOWARD HILL style longbows.
along comes jim & buddy from 21st century longbows and they design/build "the edge" longbow that's an AGGRESSIVE r/d longbow which braces to a true "D" longbow shape. one fast mutha of a hybrid longbow - a wolf set among sheep, porsche versus beetle - you get the picture.
well, it passed the ifaa longbow test and needless to say, if you didn't shoot "the edge" longbow, you were at a competitive disadvantage with your slower elb or hill (the ifaa classic target longbow event has target distances far beyond the scope of a true trad bowhunter). "the edge" won the ifaa longbow champs at least once that i know of, but probably more.
i'll leave it to y'all to think about that one! :D