Well, I have my sumbu. I ended up with only five because one of the females died in one of the shells. I don't know why, maybe starvation or she got stuck??? She had been hiding in the shell for a while before I bought them, so it was assumed that she was guarding some fry, and she may have been, but after not seeing her still for a couple day I decided quickly lift the shell out and hold it up to a light to see if I could see any shadows. But when the water started to drain from the shell there was a very bad odor and I realized why I hadn't seen her. So I threw out that shell and did a big water change. Very unfortunate, and I wish I knew what happened, but atleast I still have the other five.
They are the dark variant, not the light variant with yellow fins. So I am still looking for the other variant. But I am very pleased with these guys.
Heres a couple of pics of the ones that didn't hide when I walked up to the tank.


When they become more comfortable with my presence I will take better pics.