Delay? I realize people have a life outside of chickens. lol
As a kid I had some miniature blue gamefowl. I liked them, but know a little more now. The one's I had were on the large side and pretty flighty, but nice birds overall. I have been trying to breed down some of SDM's blues. After talking with some of the miniature gamefowl breeders, they suggested using a really small Spanish line. By luck, I found a nice line of "miniature" Spanish that were dark and threw blues. The Spanish were not as small as your AGB, but the hens come in at 2 pounds and the cocks come in at 3 pounds. The advice that was given to me was to use a small hen to get the most size reduction in the first mating.
That sounds really interesting. I don't know much about the Spanish and have never had any. Pictures of SDM's blues have been really nice. I still have so much work to do with the American Game Bantam because I want them to look just as the large gamefowl and have to keep the legs blue. I'm still getting some green legs. The ABA requires them to be trimmed like the Old English Game Bantams and I don't particularly like that instead of being like the large birds. I posted a picture of male facing the camera and expected someone to comment on it. It would be nice to see some pictures sometime.