it its said that the recessive white on silkies is different from other recessive white, but if I were to suggest anything I would say use any of your cuckoo ameraucana progect roo over a white ameraucana hen and just that, see whats comes out of that, dont use silver or BBMy first lavender cuckoo had slate legs.I will go out on a limb here and speculate a little.We have recrssive white in ameraucanas plus wild type [silver] striped chicks.Also wheaten is a varient of BB red [wild type].Soo what if we try using these in the project?A white x silver cross maybe .I have a few project silvers that are 1/4 light brn project 1/4 wheaten and 1/2 silver.I have some pullets also.Maybe one of these x white then x cuckoo.Anyone else willing to try one of these ideas.Maybe a bb red easter egger x white then cuckoo or Wheaten x white then cuckoo.