I was videotaped for three days straight at our big show here in CA, plus probably like 8 or 9 interviews that were usually three hours or so long... I have won Old English classes of 450 birds as a sixteen year old. My Cubalayas were praised at a national by the breeder/judge that I bought a cock from four years ago. I don't consider a reputation when showing, because honestly it doesn't make a difference to me. The little kids in the state hate me, but they are not into it as much as I and breed maybe 20 chicks a year.
All I can say is keep breeding to the exact standard, not a revised version. Buy a scale. Keep track of how the weights are changing as they mature, and get a bird that feels solid in the hand, but doesn't weigh more than half a pound over standard. As a "reputable breeder" you should go to what the standard says, not to what someone else tells you, regardless of title. It was written by Sumatra breeders, just like you wish to be, so continue the heritage of the breed, don't change it.