Thanks for the welcome
Shaun - my cories are an unintentional mixed bag. I have two Sterbais, a sodalis (which came as a Sterbai *lol*), a leucomelas which was one of a pair but we lost one (they were the only two in the shop, and it's my fault we lost one as I didn't check barbels 'til we get home), and two melanotaenia (was three, but again lost one, this time in tank move).
Luckily the 2 sterbai, the leucomelas and the sodalis all shoal together. The melanotaenia don't shoal as much now they've lost one so I'm going to add a few cheap aeneus as I've found if they look similar they tend to shoal together.
It's difficult though because my LFS is pretty poor, so I'll have to wait and order them in elsewhere, or go to Trimar.