Those of you who have C&C cages, how solid are they? I'd love to make Sylvie one to give her addtional room. Challenge is she's on my desk in the living room. If I'm having a large group over, I move her cage into the bedroom & close the door so she's not in the commotion (I live in a one bed apt.). She's currently in a sterlite container which is very easy to pick up & move. Can someone comment on the C&C cages?