This is what I am thinking and they seem to really shun open tables completely. Some of the set ups are quite bizarre and completely encased in plastic and foil and you cant even see into them but I suppose this goes with them being collectors as I would hate to not see my tortoises. I do wonder how they thermoregulate in this enclosures and what other health problems may be caused, on the other hand in the wild they would not have one hot spot and then cool areas - the ambient temperature would be high and they would then have to find a cooler area in the shade, by digging etc. Don't worry I am not going to go and buy big sheets of plastic(!!) but find it interesting to get views on different forms of husbandry as I think we should always consider all the pros and cons of different methods