I have impatiently been waiting for my lovely brother to help with construction on a new enclosure for Betty. He has the saws, level, etc that I need and the carpentry experience. But he's MIA and I'm done waiting So I have decided to convert a bookcase into a new indoor enclosure for Betty. I know most threads that I've read on others who have done the same thing say they line it with a shower curtain liner. My question is, the back of the bookcase is a very thin & flimsy piece of something lol. Do I need to reinforce that with something or will the shower curtain liner be enough to support the weight of the substrate & hides, etc. I was looking at a bookcase from walmart & then getting 2 side tables to support the bookcase. I just don't want to miss a step & then have a disaster on my hands