The file 'Improved Block For The Native American Flute 3D Printer Model' is (stl) file type, size is 8.6KB.
I had an issue with the lowest note on the low d flute, it was jumping octave up. so I made this block with angled plane (I stole the idea from some flute master on youtube) and voila, the problem is gone. now I can produce powerful and deep D note :)
flute_block3.stl | 45.2KB |