After much searching, the consensus is that commercial and hatchery Cornish X broilers are actually a secret 4 way breed which no DIY breeder is going to achieve by any method other then an accident. Historically, Red Laced Cornish Cocks and White Rocks Hens were crossed as a solid meat bird and likely very close to the original industrial CX, but documented results are absent 50+ years of breeding and feed enhancement. I'm looking for, and failing to find, any results someone may have on crossing these from hatchery stock today. I'm interested in integrating eating eggs, hatching eggs, and meat chicks into our homestead income stream out of a single flock. The White Rocks hens would seem to fit their end of the equation for this well, but I'd like to hear how their chicks would fair for meat production when crossed with the Cornish. If the meat bird experiment fails, my exit strategy would be to unload the Cornish cocks and replace them with New Hampshires in order to sell Comets, forgoing the meat aspect. Thanks in advance to anyone who can chime in with experience of references.