There is nothing "magic" about having the balance (center of gravity/CG) at or near the hinge pin. Relating/referencing the CG to the (front) trigger does make sense as the trigger must be pulled to fire the gun. Therefore, one hand must be located so as to allow finger contact with the trigger. Normal guns are stocked so that the trigger hand is to the rear and the other hand is placed to the front. The location of the hands relative to the CG determines the % of the gun's weight held by each hand. Said % is a personal preference. I have measured guns with up to 1 7/8" difference in length between the hinge pin and the trigger. Ergo, referencing CG to the hinge pin is not a useful piece of data.
That is one snazzy balance fulcrum; material, design, and workmanship clearly place it among best work tools.
How does one use balance information? Find a gun that suits you - you feel no urge to relocate your front hand from where you initially placed it ( your natural hand spread). Balance the gun over a fulcrum/pencil/finger (extended finger is only slightly less accurate than a actual fulcrum) and measure distance to trigger. And that length is your preferred balance location. It doesn't mean that is the only dimension you can shoot. But, just like stock fit dimensions, the further you stray from that dimension the more difficult it will be for you to shoot well or enjoyably.
BTW, those are some nice shootin' irons. Also, the use of furniture shipping pads as backdrops was down right clever; my compliments.
Last edited by Rocketman; 08/08/21 11:48 PM.