I just bought the iris cb70 rack from animal plastics. With that one they recommended the radiant heat tape that goes down the sides of the rack instead of the back or belly heat. I got the one with 3 tubs. I would have loved to get the one with 6 or 7 but 3 is the biggest one that will fit in my tiny car. I opted for the iris one also because those tubs have flat bottoms with no grooves which makes for easier cleaning. I have not received the rack yet but it should be in by the first week of February.