Hello folks just wanted to thank everyone who uses this forum, as you have been an invaluable help. With all your advice, I have started raising my own mice feeders after picking up two racks at the Hamburg, PA show and that has been very successful for me. Now I have put together my first double stack rat rack (picture included) I currently have 8 females and 4 males for a 1-2 ratio. I bought what I thought was 9 females and 3 males but I should have checked them before I got home. Any way the new rack took me three months to build, I was recently in an auto accident and could not do much recovering from a broken right hip and left knee. But hey, I think it came out very well. I used the Home Depot mortar tubs and as you can see, there is still room for four more tubs. As my rack fills with feeders, I will fill the rack with tubs. Currently I am feeding 2.7 het pied BP’s, 2.6 het albino BP’s, 1.0 pastel, 0.1 cinny, 0.1 spider, 0.2 normal’s and 0.2 red Bloods. Needless to say, raising my own feeders is a good thing! Most take F/T but a few will only eat live and this will help. I used a single rack model and simply widened it to add the middle support to make it a double rack. I want to put a water system on it next. Oh, in case you are wondering the slide rails stick out four inches beyond the face of the frame so it will hold the tubs in a pulled out position allowing for two-handed functionality.