Sprite, that baby has really done some growing! Good work. The foto is not detailed enough, but the form reminds me of two not too closely related, but similar species; A. loripes and A. longicyanthus (when young). I tend to the former. Do you have or have seen an A. granulosa? A. loripes has similar proportions, but the form is more a bush (caespitose) and the axials are less than half as long as granulosa (which tends to table). All members of the loripes group have a very smooth coenosteum and plump-looking corallites. Members of the echinata group, to which A. longicyanthus belongs, have a much finer general appearance with a often reticulate coenosteum that one can just make-out under the tissues.
Now that it has grown a bit, I see it cannot be either A. turaki or A. lokani. Good that you continue to show fotos, there is a lot of knowledge to be gleened from these developement comparison.
MechEng, thanks for the confidence, but you do realize how much guess-work is actually involved. Fotos are tough to judge! I hope people try to cross reference and not simply accept my word!