Torsion Box Assembly Table

My workbench serves also as an assembly table which means that my assembly table is not truly flat. When building tables and other projects that require a dead flat surface to work with, my bench is not reliable. I built this mobile torsion box which is flat to .0001 inches. It is true over the 4×6 foot span. I simply roll this to my bench and set it on top to serve as an assembly table when needed. easy to make out of MDF and hardboard.

torsion box 2    torsion box 1