ID of this acro?

[MS Reef Addict]

I've grown this from a small frag but my LFS doesn't really sell that many corals by name.

 

[edmondspl]

could be a Acropora Simplex but not sure

 

[Frick]

Maybe Acropora simplex. They usually grow flatter almost in thin sheets.
http://coral.aims.gov.au/factsheet.jsp?speciesCode=0836