Oh I was talking about like a wood frame lol. I don't have the full rack, but would love to make it move around easier. So I was thinking of building a frame with 2x3 or 3x3 and putting casters on it. Wanted to see if anyone else has done something like that. Don't need anything fancy looking just functional. I have no time to go to freedom breeder place to get one so think building one would be better and cost effective.