Hey you are welcome!
Glad you got a second cage; it makes monitoring food intake, poops and individual behaviours so much easier! Not to mention the chameleons themselves feel more secure.
I'm not keen on substrate in cages. Accidental ingestion of bedding can cause blockage of the digestive system which can lead to death. Better safe than sorry I figure. Some people do use it with positive results but it's not for me. Also I'm lazy so picking up poops is so much easier with a bare floor! If you do use it make sure they are not eating it.
The artificial vines are fine.
Cheers,
Trace