Yes, Cat from Treasured Chinchillas is absolutely amazing. Her craftsmanship is impeccable. I just received an order from her and all the shelves were perfectly sanded and proportional. Each piece on the bridge was sanded down so there were not sharp corners/edges. Prices are fantastic. And it took 4 days to get to me from the time I paid her. http://www.treasuredchinchillas.com/wood_bridges__ledges
Yeah I would say it depends on the chins. Mine hate any unstable surfaces, except for the top of their fleece cubes (why sleep inside when you can sleep on top of it?:rofl. They prefer to jump from ledge to ledge.