Hey, I have a few silkworms at fullgrown size and am wondering how many do i need to start the next generation. I know you only NEED 2 but of course u might not always get a male and a female.. and they might not "hatch" out of hte cocoon at around the same time to meet each other. also they might not make fertile eggs even if they do right? So what seems to be the magic number to ensure a batch of good eggs?