Well, since I'm assuming you've discovered, after all your scientific research, the means of keeping all fish to a maximum growth of 3" as well as successfully completing, with a 100% success rate of course, your scientific approach to both inhibiting aggression in marine livestock and weaning any marine species to flakes, I believe you'll have a most beautiful and peaceful tank.
I'm also very confident that, in the most unlikely event your scientific efforts go awry and there is a reversion to natural growth and behaviors of any of the fish, that you already have additional tanks prepared, or have made arrangements for the rogue fish to move to another home.
I would never recommend the stocking arrangements you are undertaking to anyone, but knowing the careful planning, research, and scientific procedures you implemented to resolve the issues that would normally occur under these conditions you may just be able to pull it off.
Again, I would highly recommend against any other fish keeper from attempting this, or from attempting to duplicate your time, labor and financially extensive scientific research until you're able to replicate the results numerous times and are able to provide step by step instructions for fellow hobbyist to follow.