Great stuff! Everything looks to be doing very well. Seeing your panamensis tempts me to buy some fry from you since I just lost mine, but perhaps time for me to try something else. I think you are right about the group environment helping them- mine spawned successfully when in a group but the male killed the female when I tried to put them alone in a 90g.
Your other fish are also looking good, really like the istlanums too.