Austalian blackwood (Acacia melanoxylon) is almost identical to Hawaiian koa (Acacia koa). This stuff comes from a fellow luthier, Tim O’Dea, who lives in Corindi Beach, New South Wales (Australia). I traded some red cedar tops for several blackwood back and side sets. It was a good deal for each of us: The local scarcity of cedar in OZ and blackwood in BC rendered each valuable….. to the other guy. The top on this instrument is some sweet Lutz spruce from Shane Neifer in Terrace, BC.