Using Maple Butcher Block Under a Turntable


When using a maple butcher block under a turntable, what is below the butcher block?  Cone?  Soborthane pucks?  Does it just lay on the shelf?  What are people using and how of they mounting the block?  How are they mounting the table on the butcher block?
bpoletti
24"x24"x3" maple block rests on small felt pads on a light open steel frame table spiked to the concrete.
I've taken a slightly different approach. We have a local kitchen and bath installation and manufacturing company that specializes in all types of natural and man made stone. They have a remnants yard that has various sized left over slabs of the raw material they install. I have had them cut and polish quartz bases that are 1 1/2" thick and closely match the bases on my three turntables. I use 3" x 3" isolating mat under the slabs corners and the isolating bases that come with the turntables. I have literally jumped up and down next to all three turntables and cannot cause a needle to skip or jump. Cost less than $300 for all three bases. 
@bba - I'm cheap and lazy.  Went to Amazon and picked up a maple (mable?) butcher block end grain board about the same size as my table.  I have a few different materials to try under the board including a couple of different types / shapes / thicknesses of sorbothane, a lifetime supply of different Vibrapod products (pucks and cones), cones, felt pads, mouse pads, bags of lead shot....  Long list of stuff.

I just wanted some suggestions on what others are using successfully to help shorten the experimenting.