I tried this same thing 2 years ago. I had 9 golden jar juvi along with 9 clown loaches in a 125g last yr. I have a youtube of it
Unfortunately, I didn't have same lucky as you. My jars started to kill each other as they grew to 4.5-5". The constant fighting or stress probably caused them to die. After my 3rd aro died, I gave up on the comm idea and separated the remaining aros. I eventually sold some and kept 1 of the 9. He was the most dominate one of the bunch. He is still part of my collection today.
It's great to see someone trying the 9 aro comm tank with success. Good luck with it. And continue to update us on your progress. Maybe I will give this another go in the future if you continue to have success.