Okay, I have a few questions that I'd like to ask in here. First one, do you think PVC pipe is a good ramp? Second, how do you cut a hole in the grids to allow for a type of PVC tunnel, and third, what do you think about a free-range type of living space. Clarifying the third question, my piggies have a 2x3 cage plus upper levels, but I would like to perhaps add a ramp that goes to the floor and allows them to enter and exit their cage at will (except at night and when we are not home). This would allow them to run around when they want, but also to get away from my toddler when she gets in the "ah piggies" mood, which, believe it or not, doesn't happen often (she loves them but more from a distance, lol). Just to point out because I know this would come up in discussion, the piggies would only be allowed in the living room and it would be cut off from other rooms during the hours they would be out and about, and also it is 100% piggie and baby proof (I did this a long time ago because I give them floor time in my whole living room). The whole free-range thing would be interesting because even during floor time I find like only one or two poops, so I wonder if they would go into their cages to potty. Anywho, any and all suggestions welcome.