I have a DIY rack from three 3 1/2 in butcher block. The block is manufactured by patching together about 60-80 squares of maple with the grain running in different directions. My thinking, if you can call it that, is that the different orientations would preclude linearity in the wood thus reducing vibrations. I ran threaded brass rod capped with acorn nuts on each end. It sits on Herbies isolation footers. Seems to work great.
