They are mates, or opposites. Glued a piece of stabilized walnut to a piece of stabilized amboyna with a piece of paper in between for easy separation. Cut them with a bandsaw before separating them, swapped the pieces and reassembled with a liner and epoxy held in a vice. I had a bunch of walnut kicking around in the garage, I'm so impressed with how it comes out of the stabilization process. Takes at least 48 hours of constant vacuum to get the air out of it though, approx 1x2x5 inch pieces, I have to put a fan blowing on my pump to keep it cool otherwise it gets noisy (Robinair 15310).