I did everything right on this one. The bore just tapers rather than flares or bells. The walls are very thin up top for responsive play, thickening up through the middle and downright thick at the distal end to contain the power and deliver concert quality sound. Very well behaved, well balanced didge. Excellent vocals. Trumpets are a bit bright to the drone. Overblowns are well matched. I wrote maple on the inside but I suspect it might be alder, either way, it sounds sweet and looks gorgeous. Below is a video of Jake Duncan mostly playing the trumpeted notes, though if you listen close he does hit the fundamental from time to time. Enjoy.