That advise was not directed at you or someone else thinking about introducing the blue eggshell mutation to an stablished breed. It was intended for people wanting to produce as much blue eggs with the least investment in time and resourcesFunny in a way, a lot of people said this to me in 2013. I told them that if I want to spend $100,000 developing blue egg laying Silver Laced Wyandottes, I have the money and will do it if I choose. Fortunately, the cost has been a lot less. I estimate about $20,000 mostly in feed costs. I've had immense fun in the process learning about chicken genetics and figuring out how things work that nobody to my knowledge has documented. I made a few stupid mistakes along the way, but I learned from them.