Sorry for the delay. The wenxianensis are doing really well, and have grown noticably. The skin looks just the same as at the beginning, with a slight shine but still very knobbly. All food that has gone in seems to have been eaten, and they have moved extremely little, although I understand this is to be expected of wenxianensis. Here are a few later pictures, plus one of the tank, which as I said is very simple, just a small drainage layer, then soil and moss, topped with plenty of cork bark. Any further advice would be greatly appreciated.