Well as you may know it is a 25% chance to get a visible morph from two 100% hets. 13 eggs will definitely get you more rolls of the dice, but the odds remain the same. I have seen 25% and 50% visible success personally of friends clutches. I just bought a pair of 100% het pieds. the male has a leopard pied father. I had a friend tell me to get rid of my male and he will let me use his visible pied so I get a 50% chance. But I am taking the 25% chance on the Leopard Pied outcome. *fingers crossed