Yep. I woke up this morning thinking on the JG/CX cross. No idea what it would look like (white?), but I think it may have possibilities.
Also working punnett squares on a JG/BR cross, looks like by the F3 generation I would have homozygous barred males and females. If I can transfer the JG frame and size (or even improve on it?), could be a good table bird. Food for thought.
I've tried using the punnet square. It's beyond me.