I am about to design and build a frost top pizza table. I have previously built one but, in the name of R&D, would like to compare notes. Information needed on all aspects such as different surface materials, mounting evap tubes, superheat, ect. The one I built was 22"x37". Copper tubing was clamped to 3/8" thick alumnum. I used a thermal mastic to help improve transfer between tubing and Alum plate. Thermal mastic was then trowled on the alum plate ,non tubing side, and then tightly anchored to granite. the tubing was then enclosed in a SS box which was foamed in insulation. It works well but is very labor intensive at this stage of developement. Any suggestions? Ken