What component should be on a walnut board?

I'm curious to see if I can get a concensus on this question. I have 3 components (Arcam FMJ23T cd, Audible Illusions preamp, and a SOTA Sapphire TT) and only 2 walnut cutting boards. What two components would benefit most by sitting on the cutting boards? I have the components currently sitting on Audio Points (from Star Sound) on shelves made of pressed wood. I intend to put the cutting boards under the audio points supporting the component.