I have no idea how to estimate colony size now (maybe someone can give me some tips haha).
They have grown massively and are soon in need of expansion, they are taking 2-3 live small crickets daily. So far I have only had one soldier escape and that was because he was in a test tube I took out to clean.
As you can see in the photos the brood pile is gigantic, the Queen is literally sitting on a mountain of brood!!