The wireless sensor is only for humidity. I have probes both on the Kane heat mat and on top of the substrate 92 under substrate 89 on top, same for his cool side one on top of the Kane mat and one on top of substrate 88 under substrate and 84 on top . If I thought he was to big for the hole in the hide I wouldnt of bought it, I will change it along with the other hides when he's bigger. I don't think the change in cage affected him, he was in a v211 and he acts the same in the v400. As far as getting another snake, does it mean when sometimes my beardie and my female Leo rejects food that I should get rid of everything else and focus on those 2? Or if a breeder can't get one of there snakes to eat they should quit the buisness and sell everything until they get that one snake to eat?