Nice rack!!! I am just finishing up on mine though on a much smaller scale. I actually bought a 3-part pull out and made it into a new breeding rack. Its got two portions plus my two ten gallon tanks...hoping to breed 2 females to one male per tank and then seperate the males from females once they are ready to be weened. I've got 17 pups that are a week and a half old now...will be keeping two of the females and one male, they are from two different females so I will have no problem with the worry of inter-breeding.