I have just finished the second copy of the great Invencible. I am known for my copies of historic instruments and I think it has a lot to do with how extremely careful I am to record and reproduce every aspect. These Invencible copies represent a new level of fidelity right down to the color of the varnish and the wood used . A copy of the original silver plaque is afixxed to the head too. Of course the interior structure and the thicknesses are exactly the same as the original.