I'm so happy your babies are doing well Gizmo! I currently have two juvies: one leucistic and one melanoid. I've had them just over a week and they're already growing so quickly! They gobble up their daily ration of bloodworms, then beg for more! I'm hoping I have a male and a female...little axie babies would be so much fun! (:
I have my three adults in a 20L right now, temporarily, and the babies are in a 30 until they are big enough to not need live food. I have no clue how many babies I have currently, and I don't feel like counting them, I'll guess about 20 or so? And they are about 1/2 - 3/4 of an inch long, just barely getting front legs with the bigger ones.
There is danger of cannibalism until they are around 6 inches long, even after that depending on how they are raised. However with the right care they can live together their whole lives as long as they are well fed and given lots of hides.
I was told that with plenty of hides, space and proper food, the cannibalistic stage isn't something to be overly concerned about. Mine do squabble over food sometimes but they've never actually injured one another and I always have a divider ready in case I were to need it!