Here is the pic and description to go with the pic that I saved a while back. I didn't remember it was a Pastel as well, but same situation



"Here is the father of the Leopard Super Pastel Double Het Axanthic Piebald. After 2 seasons and over 10 clutches he has produced 100% Leopards! If my theory is correct that the Leopard gene and the Piebald gene can't be separated then all Super Leopards must be Piebalds."