Tap training is big. Also, especially when young, I would support him well without restraining him. BE THE TREE!
He looks great and should calm with time. Behira nailed me when she was 600G (female BI) and I barely felt it. That was a food response bite too. That's when I started tap training. She still has a crazy food response, but no incidents since the tap training. It really works wonders. She is a total sweetheart once out and once tapped lets me pick her right up.