Daniel,
It's important to remember that when selecting snakes to be used to produce combos or any breeding project for that matter that both sides of the pedigree come from lines of selectively bred quality animals.
Here is a photo of one of my yellow striped pieds, I can't wait to see the pastel pieds that this little girl produces. Starting off with quality animals will only increase the probability of reproducing quality animals.
http://i314.photobucket.com/albums/l...&1464592707930
Best of luck with the project.
Brian