Sweet man! Good luck on this!
I have my two remaining EBJD's from the five I got from Hollywood in the same tank as my two smallest Gold JD's. I think the biggest EBJD is a male - not sure, for sure. I am hoping one of the smallest golds turns out to be a female. No blue on the gill plates of any of my golds at this point. The 5th largest gold who is the largest gold in the tank with my EBJD's seems to get along very well with my biggest EBJD. They seem to both be tolerant of each other, but not real tolerant of the other blue or gold in the tank. I hope this is a sign of budding romance, but they are both a little over 3" so it is a bit early yet to get too excited...
In my case then, 4 would be a croud.
If all goes well for both of us, I would be interested in trading BG/GG's...
Patrick