The only thing I would add to the above is to use Maple instead of MDF. All woods have a signature, maple, oak MDF etc. The top shelf, the one over the sand made out of maple or oak (solid, or glued like a butcher block)would make for a faster more alive sound than mdf. Besides if you stain it, it makes for a much more atractive material. Idealy make the whole thing out of wood, it will still be much cheaper than the comercially available ones.
Just my 2 cents. The original idea came from the folks at Shun Mook.
Good luck
Just my 2 cents. The original idea came from the folks at Shun Mook.
Good luck