Just over a year ago I was given a sling. It wasn't known what species it was, just genus Cryiopagopus. Getting bigger now, can see physical traits. After doing some research, I think it's C. schmidti. It has started burrowing.
This sling is way too small to even guess what species it is. You're going to have to wait until it's much larger when it's adult coloration and patterns start to show. Until then, your sling looks like any Cyriopagopus species.
@Mirandarachnid Thank you! I'm planning to add some more today. I didn't think about that back when I got the skull (had no idea what kind of T it was). That actually did happen (didn't crush it) bit started sinking into its tunnel. It has now used the sunken skull to build its tunnel opening, but I'll take it out.
As it gets bigger I will try to get better images.