Since different makes have different action lengths, I fail to see the value of balancing on the hinge pin. The question is how it works as a dance partner when you and the gun and the bird are in motion. If you struggle to get the gun moving, it is too heavy forward. If you struggle to keep it moving, it is too light forward. The guns that work for me tend to balance about 4.5" ahead of the front trigger for walkup shooting, and 5" for pass shooting, but that's not a hard and fast rule.

Trigger(s), balance, and fit. The stocker is the person to see for two of those.