It's gotten too cramped in my pot with young mesemb seedlings so I've transplanted the biggest - Aloinopsis malherbei - away from the others yesterday. This is their first root check. :) The second plant from the left is actually a month older than others and it does look more like an adult.
Also, while pulling out the A. malherbei I've pulled out a couple of the A. schooneesii to find nice carrot-roots. Those are pretty thick if you see them in relation to the plants themselves. Hopefully they will grow into some impressive caudiciforms in a couple of years (more like 10 years...).