Yes I know about cat hair .My last track was where their was no door.Now I have a door and the cats only go in when I go in sometimes.I had a hairball derail my train once .They do love to sit on the stools and watch the trains.They just are amazed by them.I think I will be getting the Digitrax zepher system to operate the layout later.Will use DC for now while laying and testing track.Anyone use digitrax.Thanks Bob