Memo and Snorkel Bum, thank you for the compliment on my gun.
Also, thanks for you know what Snorkel Bum
I don't know what costs would be for another gun like mine, more than anything that's a labor of love so it's hard to put a price on it. I'm just happy that it looks good and it kills big fish too where I aim
To answer your question, from a production stand point theoretically a gun like that would be a limited production and small quantity, discard of wood would be high to find the right pieces of teak with the right density and straightness for lamination, material costs, machine setup, CAD design and computer time would be the same as any other product, so my rough guess would be that with the correct 8mm shaft with big shark fins or tabs, multiple bands, wishbones and special tip like mine it would be somewhere in the neighborhood of $1,000 + - $200.
Murat you're pretty savvy about spearguns ballistics considering you spend more time on the internet than you do in the water!
I must admit, I've been on the internet more than I've been diving too lately
Basically like you said, the wood stock is wider and more positively buoyant towards the front end of the gun so the weights positioned at the extremity from the center of mass play a more significant role in effecting the balance of the gun there rather than positioning it closer to the center (they also help counteract the Buoyancy). It also adds some stability to the front end from the shock of the bands, especially when using two bands instead of one. The stock Master Americas are balanced better than mine and the center of gravity or balance (whatever its called) is right in the middle 70cm for the complete 140cm gun length including handle on a 115cm.
Later guys,
Mark