I have had no problems with putting my hand in the cage with Moussa so far. But, in anticipation of any future issues, I mounted a short perch on the inside of the door to the cage. This perch is positioned so that the cage door easily swings open and shut, and when the door is swung open, the perch is outside of the cage. Moussa has learned that if he wants to come out of the cage, he must get "ready," which means he must step onto the door perch and wait for the door to swing open. Then he steps up onto my hand. This has become a routine with us. Hopefully, this will continue to work for us, should Moussa become more cage territorial in the future.
If he's not quite ready to come out, I just leave the door open and let him climb out whenever he's ready, but most of the time, he is very anxious to come out.