ID Acro if possible

[Hingeback]

Is it possible to ID this please, Probably another easy one but help would be greatly appreciated.
I apologise if photo's are not good enough.

 

[Kolognekoral]

The fotos are great! But the coral is in the middle of developing, which makes it a bit tough. Strongly resembles a young A. tenuis. That is only a guess.

 

[Hingeback]

Again much appreciated Kolognekoral.
Hope to post as it grows and matures.

 

[rleechb]

Tenuis has cusp-like corallites arranged in a rosette fashion... pretty sure it's not a tenuis.

I'd say A. Nana