Hopefully someone can help me with my project. 
I am thinking about and have researched and spoken with several people about this and I get mixed reviews.  What I am thinking of doing is finding a Bantam Cornish Rooster to breed to my Large Fowl RIRs and Leghorns and I have some mixes.  Now I only have 7 hens and I keep them in a wire bottom hutch.  I have found over time that the smaller the bird the better they do on wire, so I am wanting to go with Leghorns mostly for my eggs and have  cross with good meat qualities.  I love the Cornish and have looked at them for several years and have attempted to hatch shipped eggs on 3 occasions only getting a few to start hatching but just run out of steam before they get the job done. 
So I am reading that the mother determines the size and the father determines the markings, but I can't find which one the chest meat traits come from.  So going by this I should be able to expect a LF size offspring with Cornish like markings. 
So this leads me to my next question which is if this is a good idea, what breed of Cornish should I go with, or should I just say color of Cornish?  I think I should say breed because I have noticed that the Dark Cornish seem to carry themselves differently than the others. 
And in breeding a red laced Cornish to a Leghorn or Rock, will you get a white bird or a redlaced?  Breeding to a RIR what color would the offspring be from a red laced rooster? 
I look forward to your thoughts.  I really think a bantam will work better for us with the size of out hutch, which has plenty of length and width but may not be large enough for a LF Rooster to do the deed- I used to have Barred Rock that would wait till I let them out in the morning to pounce on the ladies, so I figure he didn't have enough room.  Plus the Cornish bantams that I have seen seem to crow less and less loudly than the large fowl of other breeds, which is good for my situation. 
Any constructive feedback is very much welcome because I don't want to waist a half year or longer to find out that this won't work.  Thanks