I tried to make 2 trilams with bubinga as a belly and hickory as the core and back and both failed. I don't recall what failed on them. Grant it they were my first attempts at building bows so who knows if it was me or the wood. I'm guessing it was me. I had a nice big piece that had been in my shop for about 10 years so I thought I would give it a try. After both failures I went got some Ipe and have not had any issues since.