I have Walter in a 2X3 C&C. I much prefer him to be in a 2x4 like the other singles. Unlike the other singles, he gets floor time. The others don't like being out of their cage. I've looked at some lofts on Cagetopia, but I'm not sure if it would be worth it considering the ramp will take up some floor space. I think the Lookout Lounge would be a good fit for us. I haven't done a 2x4 expansion because they are in a tight area along one wall. Combined, the cages are as long as a 2x7 C&C and take up nearly an entire wall. Two cages on top and two under. The Lounge would be easier to fit than another grid. I'm just not sure. Walter would like the extra room, but he'd also probably like running up onto the next level to hang out with me since my couch is right next to them.